Answer:
Only 1)
3) and 4) can't be added to produce 15
2) 10 and 30 cannot produce a force of less than 20
What does density show? Explain.
Answer:
What is Density? The density of material shows the denseness of that material in a specific given area. A material's density is defined as its mass per unit volume. Density is essentially a measurement of how tightly matter is packed together.
Explanation:
Answer:
The density of material shows the denseness of that material in a specific given area. A material's density is defined as its mass per unit volume. Density is essentially a measurement of how tightly matter is packed together.
Two identical loudspeakers separated by distance delta x each emit sound waves of wavelength lambda and amplitude a along the x-axis
What is the minimum value of the ratio delta x/ wavelength for which the amplitude of their superposition is also a?
When energy moves through a medium (such as air, water, or any other liquid or solid matter), it creates a pattern of disruption that propagates away from the source of the sound.
Two identical loudspeakers separated by distance delta X each emit sound waves of wavelength lambda and amplitude A along the x-axis.
What is the minimum value of the ratio delta X/ wavelength for which the amplitude of their superposition is also A?
On a location along the X axis, we receive a portion of the difference in their attacks when we talk along the X axis. The attacks over the wavelength are equal to the phase difference, or delta. Lambda divided by pi. The square of the temperature tude of the first three waves plus the square of the second wave's temperature, B plus two times even a two times course delta, is what determines the amplitude following a superimposed wave. Okay. The resultant amplitude, A, equals the square root of a squared plus a squared plus two times a squared in this situation because the amplitude is tiny.
Delta is now, of course, square on both sides. And we discover that A squared equals two A squared plus cost. This widget's delta are is equivalent to -1/2. Delta will be seven Pi over six. Okay, so this value is delta, which is equal to X over lambda times two pi are the ratio assaults with lambda = 7/12 from equation one.
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1.Explain why "red hot" is not as hot as "blue hot"
Red hot is not as hot as blue hot because as the temperature increases the frequencies of light emitted becomes higher leading to emission of smaller wavelength lights.
All objects emits light, even at room temperature. But it cannot be seen with human eyes as the wavelength is too high. When heated the wavelength starts to decrease ( reaching the visible spectrum ) as high heat produce high frequency lights.
The wavelength of colour visible to human eyes starting from highest wavelength to lowest wavelength is as follows: Red, Orange, Yellow, Green, Cyan, Blue and violet.
Therefore, "Red hot" is not as hot as "blue hot"
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Which of the following could be considered possible experimental errors with the motion lab? (Options in image)
Possible experimental errors with the motion lab are making a math error, incorrect measuring, cars not let go at right time, did not follow directions.
What is error in measurement?
The difference between two measurements is called an error.
The error in measurement is a mathematical way to show the uncertainty in the measurement.
Possible error in measurementmaking a math errorincorrect measuring cars not let go at right timedid not follow directionsThus, possible experimental errors with the motion lab are making a math error, incorrect measuring, cars not let go at right time, did not follow directions.
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A plane is flying to Minnesota with a velocity of 277.73 km/h, N. The plane
encounters a crosswind with a velocity of 71.97 km/h, W. What is the magnitude of
the resultant velocity of the plane? (Answer in km/h)
Answer:
466 km/h
255°
measured anticlockwise from the east direction
Explanation:
find the resultant velocity of a plane after a crosswind affects its motion. take the positive
x -direction as east, and the positive y -direction as north. The components of the plane's velocity (without wind) are
upx = 0upy = 450 Km/ hAnd for the wind.
uwx = - 120 Km/huwy = 0The components for the resultant velocity of the plane are given by
ux =upx + uwx = 0 - 120 Km/h = - 120 Km/huy = upy + uwy = - 450 Km/h +0 = - 450 Km/hThe magnitude of the resultant velocity is
[tex]\sqrt{(vx)^2+(vy)^2} =\sqrt{(-120lkm/h^2+(-450lkm/h)^2}[/tex]
= 466 km/h
Hope this helps u : )
the position versus time for a certain object moving along the x axis is shown. the objects initial position is -4m. Find the instantaneous velocity at 7s. Answer in units of m/s.
The instantaneous velocity at 7s is 1.71 m/sec.
Equation :To know the velocity of the position difference,
Use the formula,
speed = distance / time
Given,
distance 1 = -4m
distance 2 = 8m
time = 7s
v = ?
Putting values,
v = Δs/Δt
v = d₂ - d₁ / t
v = 8 - (-4) / 7sec
v = 12m / 7sec
v = 1.71 m/sec
Velocity :The velocity of a body or object determines the direction of motion. Speed is a scalar quantity in its most fundamental form. Velocity is essentially a vector quantity. It is rate of change in distance. The displacement change rate is the issue.
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In a video game, a flying coconut moves at a constant velocity of 20 meters/second in the positive direction. The coconut hits an obstacle and moves in the opposite direction with a constant velocity of 10 meters/second. What’s the change in velocity of the coconut?
A.
-30 m/s
B.
-10 m/s
C.
10 m/s
D.
30 m/s
15 points
Answer: B. -10 m/s
Explanation:
explaining how your energy system works. Make sure to explain how your system captures energy from rescue workers’ bodies to power equipment during rescue missions. Try to use the words in the Word Bank above.
Answer:
The rescue workers can get energy to the batteries in their equipment during rescue missions by using a generator to convert the kinetic energy to potential energy. Potential energy is then stored in the battery.
Explanation:
A warning buoy A warning buoy is observed to rise every 4.3 s as crests of waves pass by it.
(a) What is the period of these waves?is observed to rise every 4.3 s as crests of waves pass by it.
A warning buoy is observed to rise every 4.3 s as crests of waves pass by it. The period of these waves is (T) = 4.3s
What is period?The period defines the quantity or the required time to complete one single oscillation. It has a synonym called time period. It can be measured in Seconds.
How can we calculate the period?According to the question,
A warning buoy is observed to rise every 4.3 s as crests of waves pass by it.
According to the definition of time period, time between two consecutive peaks of the oscillation called the time period.
So, According to the question the period of these waves is (T) = 4.3s
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Light-rail passenger trains that provide transportation within and between cities speed up and slow down with a nearly constant (and quite modest) acceleration. A train travels through a congested part of town at 7.0 m/s . Once free of this area, it speeds up to 13 m/s in 8.0 s. At the edge of town, the driver again accelerates, with the same acceleration, for another 16 s to reach a higher cruising speed.
According to the given statement the final speed is v = 25 m / s.
What is acceleration explained?Velocity's rate of change with time, both in terms of speed and direction. A point or object going straight ahead is accelerated when it increases or decelerates. Even if the speed remains constant, motion on a circle increases because the direction is always shifting.
Briefing:We utilise the relations and kinematics for this exercise.
The train accelerates in the first section from v0 = 7.0 m/s to 13 m/s in a time of t = 8.0 s.
v = v₀ + a t
a = [tex]\frac{v-v_o}{t}[/tex]
a = 13-7/8
a = 0.75 m / s²
Second part Accelerate again for t = 16 seconds
v = v₁ + a t
For this interval the initial velocity is v₁ = 13 m / s
v = 13 + 0.75 16
v = 25 m / s
According to the given statement the final speed is v = 25 m / s.
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Select the correct answer. In which direction does a bag at rest move when a force of 20 newtons is applied from the right? A. in the direction of the applied force B. in the direction opposite of the direction of the applied force C. perpendicular to the direction of the applied force D. in a circular motion
The bag would move in the direction of the applied force.
What is the direction?
Recall that work is done when the force applied moves a distance in the direction of the force. In this case, we can see that the force was applied from the right. Do not also forget that the force applied must make the object to move in a given direction. The direction in which the acceleration is imparted must also be in the direction of the force.
The understanding of the impact of force on motion could be seen from the Newtons law. We know from the Newton’s law that an object would remain at rest or in a state of uniform motion unless it I acted upon by an external force. This external force makes the object to move in the direction of the force.
Looking at the question, we are told that a 20 newtons is applied from the right hence, the bag would move in the direction of the applied force.
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13. If Joe begins his hike at +125 meter altitude, and finishes his hike at +1532
meters, what is his velocity in meters/seconds if it takes 20 minutes?
velocity in meters/seconds if it takes 20 minutes is equal to 1.17m/s
the velocity of the object can be obtained by the formula v = distance travelled/ time taken
Total distance travelled = 1532 -125 = 1407 m and 20 min in sec = 20 X 60 = 1200 so velocity in m/s is 1407/1200 1.17m/s
swiftness; speed of movement or action; a fast wind's velocity. Mechanics. the speed at which a body's position changes over time in a given direction. the velocity of action or reaction; the rate at which something occurs
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13. Describe the particles when water is a gas. What is
their distance from one another? How quickly do they
move? What do their collisions look like?
When water is a gas following are its characteristics:
The particles are very far away from each other.They move very quickly.The collision between the molecules is perfectly elastic.Like every other substance, water also exists in three forms on the basis of its physical state:
In a solid state, water exists as ice.In a liquid state, water exists as liquid water.In a gaseous state, water exists as steam.The properties of steam are similar to the properties of any gaseous substance. The particles in the gaseous state are farthest from each other than in any other state. The velocity of molecules is maximum in a gaseous state.
As the velocity of molecules is maximum, several collisions between the molecules take place every second and these collisions are perfectly elastic.
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What doesn't H2O stand for
Answer:
Water
Explanation:
14. Sometimes, gas particles are similar to
billiard balls on a pool table. Explain how their
behavior is similar.
Like the Bullard balls on a pool table, gas particles are ubiquitous, so they are similar.
When two billiard balls collide the collision is nearly elastic. In an elastic collision the kinetic energy of the system is conserved before and after the collision. Therefore for simplicity, we can assume that the collision with the billiard ball is perfectly elastic. Momentum is conserved regardless of the type of impact. This means that the total momentum of all colliding objects before the collision is equal to the total momentum after the collision.
If you hit straight and the cue ball stops at impact the cue ball's momentum should all be eight This is because momentum is conserved Hitting diagonally keeps both balls moving after the collision. That is ball one exerts the same force on the ball two as ball two exerts on ball one This way momentum is conserved, so every time ball two gains momentum ball one loses This is Newton's third law.
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Is Your weight
determined by
gravity?
Answer:
Yes, because you would weigh differently on the moon, than on earth,
Explanation:
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day :)
Answer:
yes
Explanation:
the wight of an object is determined by the pull of gravity on it
68. What is the trend of atomic size
on the periodic table?
Answer:
slowly decreases from left to right over the duration of the element.
You’ve been contracted to design a dragstrip for LV Motor Speedway. To do this you need to know how far a race will travel. During a race, a drag racer accelerates at 50.0 m/s2 for 5 seconds then brakes at 60.0 m/s2 to a complete stop. Sketch position-time and velocity-time graphs for this race. What is the total distance traveled by the car from start to finish? (1146m) What is the total time from start to finish? (9.2s)
The racer which accelerates at 50.0 m/s2 for 5 seconds then brakes at 60.0 m/s2 to a complete stop has an acceleration of 2 m/s^2, travels a distance of 100m in 5 seconds.
What is acceleration ?
Acceleration is the measure of a change in velocity. Acceleration frequently, but not always, denotes a shift in speed. The direction of motion is changing, therefore an object travelling at a constant speed along a circular path is still going ahead.
Given:
Acceleration, a=?
Time, t = 5 seconds
Final velocity, v= 60.0 m/s2
Initial velocity, u= 50.0 m/s2
Therefore putting the formula,
v = u + at
=> 60 = 50 +5.a
therefore, a = 2 m/s^2
Therefore distance can be found by the formula,
x = u + 1/2 at^2
Where x is the distance.
=> x = 50 + 2 . 5^2
x = 100m
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If the length of a box is reduced to one-third of its original value and the width and height are doubled, by what factor has the volume changed?
The volume has changed by a factor of 4/3
What is Volume of a Box ?The volume a box will be the product of its length, width and height. The S.I unit is cubic meter (m³)
If the length of a box is reduced to one-third of its original value and the width and height are doubled, by what factor has the volume changed?
Initial volume = LBH
The new length = L/3The new width = 2BThe new height = 2HThe new volume = L/3 × 2B × 2H
The new volume = 4/3 × LBH
Therefore, the volume has changed by a factor of 4/3
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Design an experiment to test whether talking on a cell phone influences people’s driving skills. Be sure to specify your experimental hypothesis and identify your dependent and independent variables, as well as your experimental and control conditions. Also, include the procedure that should be used to assign participants to conditions and discuss why this procedure should be used.
in this experiment selected random people from various age groups and set a certain common rules of driving as judgmental rules and gave a call when they are in drive to check their skills.
When testing a theory, controlled conditions are crucial. When the independent variable in an experiment design is not changed or altered, this is known as a control condition. Because it maintains the driving circumstances uniform, a control condition is essential to this experiment's success in determining if smartphone use affects one's ability to drive. This would enable the only distinction between the test subjects to be the drivers' use of cell phones. Making ensuring the subjects are all travelling the same route and experiencing the same circumstances could serve as the controlled conditions for this experiment. This might be on a closed course where every subject has the same path. All individuals could use the same vehicle as additional controllers.
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You push a box along the floor against a constant force of friction. When you push with a horizontal force of 75 N, the acceleration of the box is 0.75 m/2. If the mass of the box is 10 kg. find the coefficient of kinetic friction between the box and the floor.
The coefficient of kinetic friction between the box and the floor, μ = 0.1 m/2.
Equation :To find out the coefficient of kinetic friction between the box and the floor we will the formula,
μ = F/N
where,
F is friction force
N is normal force
So by question given is mass and acceleration we have to calculate friction force,
So to find F we use,
F = ma
F = 10 x 0.75 m/2
F = 7.5 m/2
By using formula of coefficient of kinetic friction,
μ = F/N
μ = 7.5 / 75
μ = 0.1 m/2
Coefficient of kinetic friction :The kinetic friction coefficient (F) is the ratio of the kinetic friction force (F) between both the surfaces in contact during motion to the normal force Ff/N. The static and kinetic coefficients of friction are both affected by the surfaces in contact. Their values are determined through experimentation.
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Two pieces of cloth have the same color and texture. Name another property of cloth that you might use to distinguish between the two materials.
Answer:
3эщ4шнп8х34нп943неп43щ
укр
Explanation:
кпк9геъ09ге
A force directed 51.8° below the positive x-axis has an x component of 4.93 lb. Find its y component.
y= 6.26 lb.
Explanation:1. Draw the vector of the force to better visualize and understand the problem.Check attached image 1.
2. Find an expression for the force in the y axis.Using the trigonometric functions, we need to find a function that relates the angle, opposite side and adjacent side of the drawn triangle. The function that does this is the tangent.
Let theta (θ) be the angle given by the problem.
Let "y" be the missing y component.
Tangent (θ) = Opposite side (y) / Adjacent side (x)
[tex]Tan(tetha)=\frac{y}{x}[/tex]
3. Solve the equation for y by multiplying both sides by x.[tex]Tan(tetha)*x=y[/tex]
4. Substitute the information given by the problem and calculate y.[tex]Tan(51.8)*(4.93)=y\\ \\y=6.26[/tex]
5. Express the result.
y= 6.26 lb.
15. Imagine that the true speed of a car traveling on a road is 70 km/h. With a radar
gun, we determine the speed of the car five times. Which of the following
measurements represents the most accurate data set?
a. 70, 75, 78, 77, 80
b. 72, 72, 70, 68, 68
73, 73, 73, 73, 73
d. 70, 69, 70, 70, 118
The measurement that represents the most accurate data set is second measurement (b. 72, 72, 70, 68, 68).
Average speed of the car in each data setThe average speed of each car in the given data set is calculated as follows;
Average speed of the car in the first data setv(avg) = (70 + 75 + 78 + 77 + 80) / 5
v(avg) = 76 km/h
Average speed of the car in the second data setv(avg) = (72 + 72 + 70 + 68 + 68) / 5
v(avg) = 70 km/h
Average speed of the car in the third data setv(avg) = (73 + 73 + 73 + 73 + 73) / 5
v(avg) = 73 km/h
Average speed of the car in the fourth data setv(avg) = (70 + 69 + 70 + 70 + 118) / 5
v(avg) = 79.4 km/h
Thus, the measurement that represents the most accurate data set is second measurement (b. 72, 72, 70, 68, 68).
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Which of the following happens when unbalanced forces act on an object
Finding the density without having the mass having only volume
.............................................
The graph provided represents voltage and current data for resistor R. What is the resistance of R?
Question 15 options:
4.5 Ω
0.50 Ω
2.0 Ω
9.0 Ω
The resistance, given the data from the question is 2 Ω
Ohm's lawOhm's law states as follow:
V = IR
Where
V is the voltageI is the currentR is the resistanceWith the above formula, we can obtain the resistance. Detail below
How to determine the resistanceThe following data were obtained from the question:
Change in voltage = 9 - 3 = 6 VChange in current = 4.5 - 1.5 = 3 AResistance =?V = IR
Divide both sides by I
R = V / I
Resistance = Change in voltage / Change in current
Resistance = 6 / 3
Resistance = 2 Ω
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1- What does it mean that matter has mass and occupies space?
2- What kind of forces are responsible for the states of aggregation of matter
Matter is the substance which have some mass and can occupy space is well.
What does it mean that matter has mass and occupies space?Matter is any substance which has mass and occupy some space by having the volume. All physical things are made up of matter and an easily observed property of matter is its state or phase. There are three states of matter Solid, Liquid and Gas. These three matter are responsible for the production of things. The matter can occupy the space but the same matter can not occupy the same space.
Which two types of forces are responsible for state of matter?The state of a substance directly depends on the balance between kinetic energy of the individual particles and the intermolecular forces between them. If forces are strong, state of matter changes into solid and liquid.
So we can conclude that matter is the substance which have some mass and can occupy space is well.
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In finding the volume of a solid, when would water displacement be especially helpful?
Answer: when the world ends
Explanation:
wild guess
The divorce rate in the United States quadrupled over the twentieth century, from less than 1 per 1,000 people in 1900 to 4 per 1,000 in 2000. Although declining in recent decades, the rate today is still 3 times higher than it was in 1900. Explain this dramatic change in social arrangements over the 20th century in the view of each of the three sociological perspectives: Functionalist Theory, Conflict Theory, and Symbolic Interactionism. Include in your answers the primary drivers of social change emphasized by each perspective. In the coming decades, do you think the divorce rate will continue to fall, flatten out, or rise again, and why? Use one or two paragraphs for your answer.
PLEASE ANSWER!!! I'm very overwhelmed with schoolwork right now.
Divorce is viewed negatively by functionalists from a macro perspective. A functionalist would blame divorce on the breakdown of social structures rather than looking at the persons involved. Some of the structures that have evolved over the years leading to the rise in divorce rates according to Functionalists is the increasing erosion of the traditional role of men and women in the society.
What does the conflict theory say about divorce?According to conflict theorists, divorce is the consequence of a disagreement over resources in a marriage.
Conflict theory holds that the disintegration of marriage occurs from rivalry for resources and authority within the marriage, just as it does in a society when groups compete for limited resources.
What is the relationship between symbolic interactionism and divorce?Choices, according to symbolic interactionists, are based on learnt behavior.
Symbolic interactionists believe divorce is the consequence of two persons affected by their friends and family members.
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