in a liquid with a density of 1500 kg/m3 , longitudinal waves with a frequency of 410 hz are found to have a wavelength of 8.00 m . calculate the bulk modulus of the liquid. express your answer in pascals.

Answers

Answer 1

The bulk modulus of the liquid in pascals is 1.26 x 10⁹Pa.

what is bulk modulus?

The bulk modulus is a measure of a substance's resistance to compression. It is a mechanical property of a material and is defined as the ratio of change in pressure to the fractional change in volume. In other words, it measures the ability of a substance to withstand changes in volume due to an applied pressure. The greater the bulk modulus, the more resistant the material is to changes in volume. It is typically measured in units of pressure, such as pascals (Pa) or gigapascals (GPa). The bulk modulus is an important property for materials used in engineering and construction, as it affects how well a material can withstand loads and stresses.

To calculate the bulk modulus of a liquid, we can use the equation:

Bulk modulus = (density of the liquid) × (speed of sound in the liquid) ²

First, we need to calculate the speed of sound in the liquid.

The speed of sound in a liquid is given by:

Speed = (wavelength × frequency) / (2 × pi)

To calculate the bulk modulus of the liquid, we can use the equation:

Bulk Modulus = (density × (speed of sound)) ²

The speed of sound in the liquid can be calculated using the equation:

Speed of Sound = (frequency × wavelength)

By substituting the given values into these equations, we can calculate the bulk modulus as follows:

Speed of Sound = (410 Hz × 8.00 m) = 3280 m/s

Bulk Modulus = (1500 kg/m³) × (3280 m/s) ² = 1.26 x 10⁹ Pa

So the bulk modulus of the liquid is 1.26 x 10⁹ Pa.

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Answer 2

In a liquid with a density of 1500 kg/m3 , longitudinal waves with a frequency of 410 hz are found to have a wavelength of 8.00 m. The liquid has a bulk modulus of 1.26 x 10⁹ Pa  in pascals.

How does bulk modulus work?

A substance's compression resistance is measured by its bulk modulus. A material's mechanical property is the ratio of a change in pressure to a change in volume fractionally. To put it another way, it measures a substance's capacity to withstand changes in volume caused by pressure. The material's resistance to changes in volume is inversely proportional to its bulk modulus.

It is typically measured in pascals (Pa) or gigapascals (GPa) pressure units. Because it influences how well a material can withstand loads and stresses, the bulk modulus is an important property for materials used in engineering and construction.

Evaluating :

The equation can be used to determine a liquid's bulk modulus:

Bulk modulus = (density of the liquid) × (speed of sound in the liquid) ²

The speed of sound in the liquid must first be determined before we can calculate the bulk modulus, which is equal to the liquid's density divided by its speed of sound.

The following equation can be used to determine the liquid's bulk modulus: Speed = (wavelength x frequency) / (2 pi)

The following equation can be used to determine the liquid's sound speed: Bulk Modulus = (density/speed of sound)/2

The bulk modulus can be calculated as follows by substituting the given values into these equations: Speed of Sound = (frequency  wavelength).

The liquid's bulk modulus is therefore 1.26 x 109 Pa.

Speed of Sound = (410 Hz  8.00 m) = 3280 m/s.

Bulk Modulus = (1500 kg/m3)  (3280 m/s) 2 = 1.26 x 10⁹ Pa

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Related Questions

why (if you are careful) are you able to float a needle on the surface of water?water has adhesive properties.

Answers

Floating a needle on the surface of water is possible because of the phenomenon known as surface tension.

Surface tension occurs when molecules of a liquid stick together, creating a thin film of liquid on the surface. This film is able to support objects that are light enough to float.

The adhesive properties of water are due to its molecules bonding together, creating a strong force that allows it to hold objects on its surface. When a needle is placed carefully on water, it is light enough to be supported by the surface tension and the needle will float.

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A piano tuner tretche a teel piano wire with a tenion of 879 N. The wire i 0.400 mm long and ha a ma of 3.30 g.

What i the frequency of it fundamental mode of vibration? What i the number of the highet harmonic that could be heard by a peron who i capable of hearing frequencie up to 10000 Hz?

Answers

The highest frequency audible is the 24th harmonic. The fact that a standing wave on a wire generates an identical sound wave in the air is used in component (b).

The basic frequency formula is what?V = v/2l corresponds to the fundamental frequency (n = 1). Overtones or harmonics are higher frequencies that are multiples of the fundamental frequency. The first harmonic, also known as the first overtone, is typically referred to as the fundamental; the second harmonic, or n = 2 yields the first harmonic.The highest frequency audible is the 24th harmonic. Evaluate, The fact that a standing wave on a wire generates an identical sound wave in the air is used in component (b).For each instrument, the overtone intensities (f2 = 524 Hz, f3 = 786 Hz, f4 = 1048 Hz, etc.) change despite the fact that the fundamental tone's frequency (f1 = 262 Hz) is the same for all of them.              

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a ferry boat shaped just like a brick is 7.7 m wide and 6.2 m long. when a truck pulls onto it, the boat sinks 5.57 cm in the water. what is the weight of the truck? the acceleration of gravity is 9.81 m/s 2 . answer in units of n.

Answers

The weight of the truck is approximately 254,979 N or 254.9 kN

To find the weight of the truck, we can use the principle of buoyancy, which states that the buoyant force exerted on an object submerged in a fluid is equal to the weight of the fluid that is displaced by the object.

First, we need to find the volume of the water displaced by the boat when the truck pulls onto it. We can use the dimensions of the boat and the amount it sinks in the water to calculate this. The boat is shaped like a brick, so we can assume it has the same dimensions on the top and bottom.

The boat's width is 7.7 m and its length is 6.2 m. The boat sinks 5.57 cm or 0.0557 m in the water.

The volume of the water displaced is the product of the boat's width, length, and the amount it sinks in the water.

Volume of water displaced = 7.7 m x 6.2 m x 0.0557 m = 25.9 m^3

Next, we can use the density of water, which is about 1000 kg/m^3 to find the weight of the water displaced.

Weight of water displaced = 1000 kg/m^3 x 25.9 m^3 = 25900 kg

Finally, we can use the weight of the water displaced to find the weight of the truck using the equation of buoyancy force which is equal to the weight of the fluid displaced.

Weight of truck = weight of water displaced x g

Weight of truck = 25900 kg x 9.81 m/s^2 = 254979 N

Therefore, the weight of the truck is approximately 254,979 N or approximately 254.9 kN.

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his state no longer recongizes alienation of affection as an issue that can be litigated. which motion should

Answers

"A motion to dismiss should be filed if alienation of affection is not recognized as an issue that can be litigated in that state.

In physics, motion is defined as a change in a body's position or orientation over time. Translation is the term for motion along a line or a curve. Rotation is another motion that modifies a body's orientation.

The four types of motion are: linear, rotary reciprocating and oscillating.

Hence , If the state does not recognize alienation of affection as a matter that can be argued, a move to dismiss should be made.

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The question is incomplete, the complete question is:

"His state no longer recognizes alienation of affection as an issue that can be litigated. Which Motion should be filed ?

what is the approximate line-to-ground arcing fault value on a 480/277-volt system where the line-line-line fault current has been calculated to be 30,000 amperes?

Answers

On a 480/277-volt system where the line-line-line fault current has been estimated to be 30,000 amperes, the approximate line-to-ground arcing fault value is 17,321 amperes.

The approximate line-to-ground arcing fault value for a 480/277-volt system is determined by calculating the line-line-line fault current and then dividing it by the square root of three (√3). The value of the line-line-line fault current must first be determined, which is 30,000 amperes in this case.

Next, the line-to-ground arcing fault current value is calculated by dividing the line-line-line fault current by the square root of three (√3), which is equal to 17,321 amperes. To arrive at this number, we use the following formula:

Line-to-ground arcing fault current = line-line-line fault current / √3

Therefore, the approximate line-to-ground arcing fault current value for a 480/277-volt system where the line-line-line fault current has been calculated to be 30,000 amperes is 17,321 amperes.

To summarize, the approximate line-to-ground arcing fault value for a 480/277-volt system is determined by calculating the line-line-line fault current, which is 30,000 amperes in this case, and then dividing it by the square root of three which is equal to 17,321 amperes. This is the approximate line-to-ground arcing fault current value that would be expected in such a system.

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1. A quarterback passes a football at a velocity of 15.2 m/s at an angle of 40° to the horizontal
toward an intended receiver 27.4 m downfield. The pass is released 1.3 m above the ground. Assume
that the receiver is stationary. Does he catch the ball to complete the pass if he were to catch the ball
at the same height it is released?

Answers

The intended receiver did not receive the ball since the ball travelled a shorter distance.

What is the time of motion of the ball?

The time of motion of the ball is calculated by applying the following formula as shown below.

h = vt + ¹/₂gt²

where;

v is the velocity of the ballg is the acceleration due to gravityt is the time of motion

1.3 = ( 15.2 x sin40 )t  +   ¹/₂ ( 9.8 )(t²)

1.3 = 9.8t  +  4.9t²

4.9t² + 9.8t - 1.3 = 0

solve the quadratic equation suing formula method;

t = 0.13 second

The horizontal distance of the ball is calculated as;

d = Vₓt

d = ( 15.2 x cos 40) x 0.13

d = 1.51 m

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A rock is thrown horizontally from a height of 6.00 m. what
is the time required for the rock to reach the ground

Answers

The time required for the rock to reach the ground is 1.11 second.

What is acceleration?

Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).

Initial height of the rock: h = 6.00 m.

Acceleration due to gravity: g = 9.8 m/s²

Let,  the time required for the rock to reach the ground is = t.

Then:

h = 1/2 × gt²

t = √(2h/g)

= √ {(2 × 6.00)/9.8} second.

= 1.11 second.

Hence, the time required for the rock to reach the ground is 1.11 second.

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a baseball player feels a frictional force of 400N as she slides into home. what impulse would be created?

Answers

The impulse that would be created by the  baseball player is  600 Ns.

What is the impulse created by the baseball player?

The impulse created by the baseball player is the product of force and time of the force impact.

J = Ft

where;

F is the applied forcet is the time of force action

The frictional force created by the baseball player = 400 N.

The time of force action = 1.5 seconds

The impulse that would be created by the  baseball player is calculated as follows;

J = 400 N x 1.5 seconds

J = 600 Ns

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The complete question is below:

A baseball player feels a frictional force of 400N as she slides into home. what impulse would be created if the force acted for 1.5 seconds?

04.06 Recording Your Cardiovascular Workout— Flexibility/Cardiovascular Log
Type Name:
Type Date:
Flexibility
Date



Stretching exercise
Muscle worked
reps/time
reps/time
reps/time
Chest/Biceps Stretch
Pectoralis, Biceps






Shoulder/Triceps Stretch
Deltoids, Triceps






Upper Back & Torso Stretch
Trapezius






Lower Back Stretch
Latisimus Dorsi






Lying Quad Stretch
Quadriceps






Modified Hurdler’s Stretch
Hamstrings






Calf Stretch
Gastrocnemius






Lying abdominal stretch
Abdominals








**Remember to use the FIT principles to help you improve your flexibility.


















Target Heart Rate Zone (from lesson 04.02 Monitoring the Heart)
Lower Limit =
Upper Limit =
**Make sure you get your heart rate into this range during your workouts.
Cardiovascular
Date






Activity Selected






Starting heart rate






Heart-rate after 5 minutes









Heart rate after 10 minutes






Ending heart rate






5-minute recovery heart rate






Length of activity (minutes)









**Remember to use the FIT principles to help you improve your cardiovascular fitness.
Comments:

Answers

The FIT principles are a set of guidelines for designing effective exercise programs. They include:

Frequency: How often you perform the exercise. To improve flexibility, aim to stretch at least 2-3 times per week.

Intensity: How hard you work during the exercise. When stretching, intensity should be moderate and not painful.

Time: How long you perform the exercise. Hold each stretch for 15-30 seconds and repeat each stretch 2-4 times.

Type: The specific exercises you perform. Include a variety of stretches for different muscle groups, such as the hamstrings, quadriceps, and lower back.

How to explain the principle?

By following these principles, you can create a stretching routine that is effective for improving your flexibility. It's important to keep in mind that flexibility is also depend on several factors such as age, injury history, and genetics.

So, it's always good to consult with a physical therapist or physician before starting any new exercise program.

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asportscar, electro-fiasco i, can accelerate uniformly to 100 km/h in 3.5 s. its maximum braking rate can not exceed 0.7g. what is the minimum time required to go 1.0 km, assuming it begins and ends at rest?

Answers

The minimum time required to travel 1.0 km is 8.75 seconds.

What is travel?

Travel is the movement of people from one place to another, usually over a certain distance and for a certain period of time. It can be done for many reasons, including pleasure, business, or to visit family or friends.

This can be calculated by taking the total distance traveled (1.0 km) and dividing it by the average speed (100 km/h). The average speed is 100 km/h because the car accelerates uniformly from 0 km/h to 100 km/h in 3.5 seconds.
Therefore, the total time required is 10 seconds (1 km / 100 km/h). However, this does not take into account the deceleration time of the car, which must also be taken into account.
The maximum braking rate of the car is 0.7 g, which is equivalent to 7 m/s2. Since the car must come to a complete stop at the end of the 1.0 km journey, the time required for deceleration must be calculated. This can be done using the equation:
Time for deceleration = (Final Velocity - Initial Velocity) / Acceleration
Since the initial velocity is 0 m/s and the final velocity is 0 m/s, the equation simplifies to:
Time for deceleration = 0 / 7 m/s2 = 0 seconds
Therefore, the total time required to travel 1.0 km is 10 seconds (for acceleration) + 0 seconds (for deceleration) = 10 seconds. Subtracting this from the total time required gives us the minimum time required to travel 1.0 km, which is 8.75 seconds.

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A roller coaster begins at rest 120 m above the ground, as
shown. Assume no friction from the wheels and air, and that no
energy is lost to heat, sound, and so on. The radius of the loop
is 40 m. Find the speed of the roller coaster at points E and F.
Note:-Use g = 10 mlsz

Answers

The speed of the roller coaster at point E is 40 m/s.

The speed of the roller coaster at point F is 49 m/s.

What is the speed of the roller coaster at point E?

The speed of the roller coaster at point E is calculated by applying the following formula as shown below.

v = √ ( 2gΔh )

where;

g is acceleration due to gravityΔh is the change in  height of the roller coaster

At point E, the change in height of the coaster, Δh  = 120 m - 40 m = 80 m

v = √ ( 2gΔh )

v = √ ( 2 x 10 x 80 )

v = 40 m/s

At point F, the change in height of the coaster, Δh  = 120 m - 0 m = 120 m

v = √ ( 2gΔh )

v = √ ( 2 x 10 x 120 )

V = 49 m/s

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a fairgrounds ride spins its occupants inside a flying saucer-shaped container. if the horizontal circular path the riders follow has a 5.00 m radius, at how many revolutions per minute will the riders be subjected to a centripetal acceleration whose magnitude is 1.90 times that due to gravity?

Answers

The number of revolutions per minute (rpm) by dividing the speed by the circumference of the path is 14.89 rpm.

What is revolutions?

A revolution is a radical, pervasive and often violent change in a society's political, economic, and social structures. It is typically associated with a dramatic shift in power, from one group of people to another, either through the overthrow of a government or through other means such as widespread protest or civil disobedience.

The centripetal acceleration of an object in a circular path is given by the equation:
a_centripetal = (v^2) / r
where v is the speed of the object, and r is the radius of the circular path.
We know the radius of the path is 5.00 m and the centripetal acceleration should be 1.90 times that due to gravity. The acceleration due to gravity is 9.8 m/s^2. Therefore, the centripetal acceleration should be:
a_centripetal = 1.90 * 9.8 = 18.82 m/s^2
Now we can solve for the speed of the riders:
v = sqrt(a_centripetal * r) = sqrt(18.82 * 5.00) = 12.76 m/s
Finally, we can calculate the number of revolutions per minute (rpm) by dividing the speed by the circumference of the path:
rpm = (v / (2 * pi * r)) * 60 = (12.76 / (2 * pi * 5.00)) * 60 = 14.89 rpm.

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1) define the term zenith. what constellation is at zenith right at sunset on january 20, 2023, and how did you use stellarium to figure it out?

Answers

The point of the celestial sphere that is directly opposite the nadir and vertically above the observer is known as Zenith.

Perseus, auriga, taurus, gemini are zenith at sunset tonight. Stellarium is a open software that shows real time 3d sky images. From which you can know the position of stars, planets, constellations and other sky objects. If you are using stellarium mobile app, just point it towards the sky and it will show the celestial objects with names. The rising constellations rotate based on our Earth and where it is as it travels through space. It can be predicted through stellarium.  The time period zenith every so often approach the best factor, way, or stage reached with the aid of using a celestial frame on its every day obvious direction round a given factor of observation.

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The point in the sky or the celestial sphere that is immediately above the observer is called the zenith.

The point on the celestial sphere that is immediately above a viewer on Earth is called the zenith. The nadir is the point directly beneath you that is 180 degrees opposite the zenith. To see your sky, drag the "Markings" pane to the side. You can now figure out the limits of the constellations.

On the meridian, roughly in the middle of the "sky," is where the zenith is located the area of the sky directly overhead, altitude = 90 degrees. In more specific terms, it is situated where declination and observer latitude are equal. The celestial equator and the ecliptic are additional reference points on the planisphere.

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at a specific moment, a falling object with mass 4 kg is moving 7 m/s and is 3 meters above the ground. how many joules of mechanical energy does the object have?

Answers

A falling item with a mass of 4 kg is 3 metres above the earth and is travelling at a speed of 7 m/s at that precise time. The item has a mechanical energy of 216.4 Joules.

A falling object's kinetic energy (KE) and potential energy may be used to compute its mechanical energy (PE).

KE = 1/2 mv ²

= 1/2 X 4 X 14 = 98

where m is the item's mass and v is its velocity,

The equation PE = m * g * h gives the potential energy of an item.

PE =  4 X 9.8X 3 =  117.6

E = KE + PE gives the object's total mechanical energy.

E = 98 + 117.6

= 215.6 J

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Position (m)
0
12
10
5. Using the graph, describe what is happening between 4 and 6 seconds.
Position vs Time
6
Time (s)
8
10
12

Answers

In the position time graph, between 4 and 6 seconds, the object is at rest because the change in position with time is zero.

What is position - time graph?

A position - time graph is a type of graph in which the position of an object is plotted against time of motion of the object.

In a position time graph, the slope of the graph is the velocity of the object since velocity is defined as the change in displacement with change in time.

From the given position - time graph, between 4 to 6 seconds, the change in position of the object is constant, hence the velocity of the object will be zero, so we can conclude that the object is at rest between 4 to 6 seconds.

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PART 1
A merry-go-round rotates at the rate of
0.37 rev/s with an 73 kg man standing at
a point 1.2 m from the axis of rotation.
What is the new angular speed when the
man walks to a point 0 m from the center?
Consider the merry-go-round is a solid 29 kg
cylinder of radius of 1.2 m.
Answer in units of rad/s.

PART 2
What is the change in kinetic energy due to
this movement?
Answer in units of J.

Answers

The angular velocity is infinity.

it's not possible to calculate the kinetic energy change when the angular velocity becomes infinity, it's an abstract concept.

What is angular speed?

PART 1

The angular velocity of an object is given by the formula:

ω = v/r

where

v is the linear velocity and

r is the distance from the axis of rotation.

The man's initial angular velocity is:

ω = (0.37 rev/s) * (2π rad/rev)

= 2.34 rad/s

As the man moves closer to the center, his distance from the axis of rotation decreases, so his angular velocity will increase.

To find the new angular velocity, we can use the same formula:

ω = v/r

since the radius decreases to 0, the angular velocity becomes infinity.

PART 2

The change in kinetic energy is given by the formula:

ΔK = 1/2 * I * (ω_f^2 - ω_i^2)

where

I is the moment of inertia and ω_i and ω_f are the initial and final angular velocities respectively.

For a solid cylinder, the moment of inertia is:

I = (1/2) * m * r^2

where

m is the mass and r is the radius.

The moment of inertia for the merry-go-round is:

I = (1/2) * (29 kg) * (1.2 m)^2

= 15.12 kg * m^2

The change in kinetic energy can be calculated as:

ΔK = 1/2 * (15.12 kg * m^2) * (∞^2 - (2.34 rad/s)^2)

= infinity J

Note that it's not possible to calculate the kinetic energy change when the angular velocity becomes infinity, it's an abstract concept.

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a body at temperature of 100f is placed in a room of temperature 50. the room temperature does not change appreciably. if after 10 minutes the temperature of the body has dereased to 90 f, when will the body be at a temperature of 60*f?

Answers

The body will be at a temperature of 60°F after around 72 minutes.

The problem can be solved using Newton's law of cooling, which states that the rate of change of temperature of an object is proportional to the difference in temperature between the object and its surroundings. Mathematically, this can be represented as:

T(t) = T_s + (T₀ - T_s) e^(-kt)

where T(t) is the temperature of the object after time t, T₀ is the initial temperature of the object, T_s is the temperature of the surroundings, t is time and k is a constant of proportionality called the cooling coefficient.

Use the initial condition T = 90°F at t = 10 min, T_s = 50°F, T₀ = 100°F to solve for the value of k.

T(t) = T_s + (T₀ - T_s) e^(-kt)

90°F = 50°F + (100°F - 50°F) e^(-k)(10)

40°F = 50°F e^(-k)(10)

e^-10k = 0.8

k = 0.0223

thus we can calculate the time it takes for the body to reach a temperature of 60°F:

T(t) = T_s + (T₀ - T_s) e^(-kt)

60°F = 50°F + (100°F - 50°F) e^(-0.0223)(t)

10°F = 50°F e^(-0.0223)(t)

e^(-0.0223)(t) = 0.2

t = 72.1721

t ≅ 72 minutes

Therefore, it would take around 72 minutes for the body to reach a temperature of 60*F.

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_____ is the magnitude of gravitational force acting on an object.

Question 5 options:

Weight


Net Force


Gravity


Kinetic Energy

Answers

Answer:

Weight

Explanation:

The magnitude of the gravitational force acting on an object is weight of the object.

Answer: Option B

Explanation:

Any kind of force is a vector quantity having magnitude and direction. And it is also known that all kinds of forces obey Newton’s second law of motion. This means that the magnitude of any kind of force will be equal to the product of mass and acceleration exhibited by the object.

As the term acceleration is also a vector quantity in the second law of motion, so the direction of acceleration will define the direction of force. Thus for the gravitational force, the acceleration will be acting downward and the acceleration of the object pulled due to gravitational force will have acceleration due to gravity.

So the Newton’s second law of motion representation of gravitational force will be

                     

Now this product is also equal to the weight of the object as weight of any object is defined as the mass of the object influenced by gravitational pull.

Answer is weight…it’s the force with which a body is attracted toward the earth or a celestial body by gravitation and which is equal to the product of the mass and the local gravitational acceleration.

the terminals of a 15 v battery. after a long time, the capacitor is disconnected from the battery but is not discharged. what are the charge on each electrode, the electric field strength inside the capacitor, and the potential difference between the electrodes a. right after the battery is disconnected? b. after insulating handles are used to pull the electrodes away from each other until they are 1.0 cm apart? c. after the original electrodes (not the modified electrodes of part b) are expanded until they are 20 cm in diameter?

Answers

After the original electrodes 0.8nC are expanded until they are 20 cm in diameter.

What is meant by diameter?

A line that is straight and cuts through the middle of a body or figure. Particularly: the length of a diameter; a line segment passing through the centre of a circle with its ends on the circumference.It is twice as long as a circle's radius, or Diameter = 2 Radius.The diameter of a circle cuts through the centre whereas the radius extends from the centre to the edges of the circle. The diameter of a circle effectively divides the shape in two.The diameter or length of a circle is its circumference. A straight line connecting a point on one end of the circle to a point on the other end, passing through the centre, is the diameter.

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An aircraft decelerate at 0.5 m/.after 8 minute it velocity ha dropped to 160 m/ .find it initial velocity.

Answers

Acceleration (a) is the change in velocity (Δv) versus the change in time (Δt), given by the formula a = Δv/Δt. This allows you to measure how quickly the velocity changes in meters per second (m/s^2). Acceleration is also a vector quantity, so it contains both magnitude and direction. Negative acceleration is termed as deceleration

Deceleration can be calculated by dividing the final velocity minus the initial velocity by the time it takes for this velocity to drop.

The known and unknown quantities from the question are as follows:

u = initial velocity = ? m/s

v = final velocity = 160 m/s

a = acceleration = -0.5 m/s²

t = time interval = 8 min × 60 s/1 min = 480 s

Calculate the initial velocity using the following kinematic equation.

v = u + at

Solve for u.

u = v - at

u = 160 m/s - (-0.5 m/s² × 480 s) = 400 m/s

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a person walks first at a constant speed of 5.10 m/s along a straight line from point circled a to point circled b and then back along the line from circled b to circled a at a constant speed of 3.30 m/s. (a) what is her average speed over the entire trip?

Answers

The average speed of that person with two constant speed for a certain distance is 4 m/s.

How to calculate average speed over the entire trip?

Assume the distance from point a and b is c, As per data given velocity from a to b = 5.10 m/sec. So,

time a to b = c : 5.10.

Since the constant speed is 3.3. then

time b to a = c : 3.30

The we can determine the average speed as follow:

Total distance = c + c = 2c

Total time = time a to b + time b to a

Total time = c : 5.10 + c : 3.30

Total time = 0.196c + 0.303c

Total time = 0.499c

Average speed = total distance : total time

Average speed =  2c : 0.499c

Average speed = 4.00801603206

Let round the result, so the average speed = 4 m/s

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a skier starts from rest on the higher peak. at what speed would she arrive at the lower peak if she just coasted without using poles? assume there is no friction.

Answers

The kinetic friction observed by skier when he starts from rest on the higher peak is 0.0.0313.

Here is the information we need:

h1 denotes the starting height (850 m)

The final height is given by h2 (750 m)

is the inclination angle (30°)

k is the kinetic friction coefficient.

The total distance traveled is given by d.

The distance traveled downward is denoted by d1.

The distance traveled uphill is denoted by d2.

Where:

d=d1 + d2 =h1/sin + h2/sin =850/sin30+750/sin30

=3200 m

Because the skier begins and ends at rest, the change in kinetic energy is zero.

When traversing a distance d, the energy dissipated by kinetic friction (negative sign) is equal to the change in gravitational potential energy.

[h2-h1]k =h1-h2d

=850-750/3200

=0.0313

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Complete question : Two snow-covered peaks are at elevations of 850 and 750 m above the valley between them. Both elevations have an incline of 30 degrees. A ski-run extends from the top of the higher peak to the top of the lower one. A skier starts from rest on the higher peak and stops on top of the lower peak. What is the kinetic friction coefficient?

The internal energy of a gas decreases by 344 J. If the process is adibiatic, how much energy is

transferred as heat? How much work is done on or by the gas?

Answers

The energy that is transferred as heat if the process is adiabatic is 0J and the work is done on or by the gas is 344J.

Given the internal energy of a gas decreases by (ΔU) = 344J

In an adiabatic process, an ideal gas' internal energy reduces by an amount equal to the work the system performs.

ΔU = work done + heat exchange

There is no heat exchange in an adiabatic process according to first law of thermodynamics.

The gas is doing work since the process is adiabatic and the amount of energy transferred as heat will be Q= 0J. If there is no heat exchange during the operation, a change in internal energy equals work done.

Then the work done by the gas is (W) = 344J

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2 attempts left enter your answer in the provided box. a metal ball-bearing with a circumference of 41.3 mm weighs 8.77 g. what is the density of the metal in g/cm3 (v of a sphere

Answers

A metal ball bearing that has a 41.3 mm circumference weights 8.77 g. the metal has a density of 7.816 g/cm3. The mass of a material per unit of volume is its density.

We must first estimate the volume of the metal ball bearing before dividing the mass by the volume to obtain the density of the metal.

First  calculate the radius,

C = 2πr = 41.3mm = 4.13cm

here, we can find the radius,

r = c/2π = 4.13/2π = 0.65cm

to find the volume,

V = 4/3πr³

V = 4/3 π X 0.65³

V =  1.14cm³

now, to calculate density,

m = 8.77g

d = m/v

d = 8.77/1.14

d = 7.6 g/cm³

Finally, by dividing the mass by the volume, we get at the metal's density, which comes to around 7.6 g/cm3.

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when two cars collide in real life they come to a stop. does this prove that conservation of momentum is not true in real life? explain

Answers

Some of the velocity from a collision between two vehicles crumples their bodies. A purposeful loss of kinetic energy occurs.

According to the rule of conservation of momentum, when two bodies contact in a closed or isolated system, their combined momentum before and after the collision must be identical if no outside force is acting on them. In other words, the system momentum is unchanged.

Momentum is defined as p = mv (in kg/s).

Where V is a body's speed, m = the body's mass, In order to maintain momentum

mv = unchanging

This is,

m1v1 = m2v2

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The spring-held follower AB has a mass of 0. 45 kg and moves back and forth as its end rolls on the contoured surface of the cam, where r = 0. 15 m and z=(0. 02cos2θ)m. The cam is rotating at a constant rate of 30 rad/s. The spring is uncompressed when θ = 90∘

Answers

The body and through a specific angle experience angular accelerations of 0.87266 rad/sec2 and 12566.8 rad, respectively.

Calculate angular acceleration ?

A rotating rigid body's angular velocity rises from 500 to 1500 rev/min under the given conditions.

Time= 120s

Finding - Angle and angular acceleration

The basic idea is that we must change rev/min to rad/sec.

ωf= ωi + αt

ωf- ωi = αt

Formula for angular acceleration: = [f- i]/t

Angle deviation formula: =it + t2/2

Calculations-

Rev/Min to rad/Sec conversion

I equals 500 rev/min

500 x 2 rad/rev x 1 minute and 60 seconds equals 52.3598 rad/sec.

f = 1500 rev/min

=1500 x 2 rad/rev x 1 minute and 60 seconds = 157.079 rad/sec

52.3598 rad/sec for I

ωf=157.079rad/sec

Now, to calculate angular acceleration, use the formula: [f- i]/t.

52.3598 rad/sec − 157.079 rad/sec = 120

1.872666 rad/sec

To calculate the angle deviated, enter -=i t + t2/2.

=52.3598 x 120 + [0.87266 x 120 x120]/2

ΔФ= 12566.8rad

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a point charge of 8.74 x 10-6 c is at the origin while a second point charge of -5.91 x 10-6 c is at the coordinates (0.53, 0.41) meters. in degrees relative to the positive x direction, what is the direction of the force exerted on the charge at the origin?

Answers

The direction of the force on the charge at the origin is towards the charge at (0.53, 0.41) m, since the charges have opposite signs and attract each other.

The direction of the force exerted on a point charge at the origin by a second point charge can be found using Coulomb's law, which states that the force between two point charges is proportional to the product of their charges and inversely proportional to the square of the distance between them. The formula for the force is:

F = k * q1 * q2 / r^2

where k is the Coulomb constant (8.99 x 10^9 N * m^2 / C^2), q1 and

q2 are the charges, and

r is the distance between the charges.

To find the direction, we must first find the components of the force along the x and y axes.

Then, we can use arctan to find the angle relative to the positive x direction.

The distance between the charges can be found using the Pythagorean theorem:

[tex]r = \sqrt{((0.53 m)^2 + (0.41 m)^2)[/tex] = 0.65 m

The x and y components of the force can then be found using the formula:

Fx = F * cos(θ) = k * q1 * q2 * x / r^3

Fy = F * sin(θ) = k * q1 * q2 * y / r^3

where θ is the angle between the force and the positive x direction, and x and y are the x and y components of the displacement vector between the charges, respectively.

Finally, the direction of the force can be found using arctan:

θ = arctan(Fy / Fx)

The direction of the force on the charge at the origin is towards the charge at (0.53, 0.41) m,

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the pipe of length l that is open at both ends is resonating at its fundamental frequency. which statement about sound is correct?

Answers

The correct statement would be that the wavelength is 2L and there is a displacement node at the pipe's mid point, if L is the length of the open pipe.

The fundamental frequency is the smallest resonant frequency of a vibrating object. Most of the vibrating objects possess more than one resonant frequency and which are used in musical instruments. On the other hand, a harmonic is defined as an integer multiple of the fundamental frequency.

Vibrating strings, open pipe, and conical air columns vibrate at all harmonics of the fundamental. Cylinders with only one end opened vibrate with only odd harmonics of the fundamental.

Hence the correct option is A.

--The given question is incomplete, the complete question is:

"The pipe of length L that is open at both ends is resonating at its fundamental frequency. which statement about sound is correct? A) The wavelength is 2L and there is a displacement node at the pipe's mid point. B) the wavelength is L and there is a displacement antinode at the pipe's mid point C) the wavelength is 2L and there is a displacement antinode at the pipe's mid point D) the wavelength is L and there is a displacement node at the pipe's mid point

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A black suv was driving east on Ridge, as the suv drove through an intersection on a green light it was immediately hit by a silver 4 door sedan. The black suv was hit on the driver's side, the suv spun halfway around and pushed on the sidewalk. Explain why the suv gets pushed and jumps the crib

Answers

Answer:

The black suv gets pushed and jumps the curb because of the momentum the silver sedan had during impact.

Explanation:

Because the silver sedan ran the light and hit the black suv at full speed, the momentum from the sedan will have enough force to push the black suv into the curb.

what is the process of splitting a uranium atom called?
a. Nuclear Fusion
b. Nuclear Fission
c. Nuclear Confusion
d. Nuclear Dillusion

Answers

Nuclear fission produces energy when atoms split apart. All nuclear power plants utilise nuclear fission, and uranium atoms are frequently employed in nuclear power reactors.

When a neutron meets with a uranium atom during nuclear fission, it splits the atom, releasing a large amount of energy in the form of heat and radiation. Nuclear fission, another name for the splitting of atoms, generates radiation and radioactivity. In 1939, Dr. Lise Meitner made the discovery of how radioactivity may be created. She discovered that radiation could be released when a neutron, a tiny particle, was fired into another atom. Fission is the process by which a heavy, unstable nucleus splits into two lighter nuclei, whereas fusion is the joining of two light nuclei to release large amounts of energy.

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