Resulting in a buoyant force that is less than the weight of the blimp. This is what allows the blimp to float and hover in the air.
The buoyant force on a one-ton blimp hovering in air is actually less than one ton. This is because the buoyant force is the upward force exerted by a fluid (in this case, air) on an object immersed in it.
The force is equal to the weight of the fluid displaced by the object.Therefore, the buoyant force on the blimp is equal to the weight of the air that the blimp displaces. As the blimp is less dense than air, it displaces a volume of air that weighs less than one ton,
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For hundred of years scientist denied the existance of rogue waves, until the presence of one was finally caught on record. When and where was the first time a rougue wave was measured?
The first recorded measurement of a rogue wave was on February 5, 1995, off the coast of Draupner, Norway. A single wave measuring 25.6 meters (84 ft) was measured by an oil platform.
What is Rogue wave?A Rogue wave is an unusually large, unexpected and dangerous ocean wave. These waves can reach up to 30 meters in height and can occur unexpectedly without regard for the normal patterns of the sea. Rogue waves are often caused by a combination of factors such as strong winds, high tides, and underlying ocean currents. Such waves can be extremely dangerous to ships and other vessels, as they can cause serious damage or even sink them. The phenomenon of rogue waves is still not fully understood by scientists, and there is no way to predict when they may occur.
Before that, rogue waves were thought to be mythical, but this measurement showed that they can occur in real life.
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let's say i was standing in one spot (zero speed facing north). then i took one step (one meter) and it took me a second to do so (still facing north). did i acceleration?
No, you will not accelerate.
Acceleration is the rate of change of velocity, which is a vector quantity that includes both magnitude and direction. If your velocity did not change in direction, then you did not accelerate.
In your case, you moved one meter in one second while facing north. Since your velocity did not change in direction, you did not accelerate. However, you did have a non-zero average speed of 1 meter per second over that one second interval. Speed is a scalar quantity that only includes magnitude, not direction. So, while you did not accelerate, you did have a non-zero speed for that short period of time.
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--The complete question is, Let's say i was standing in one spot (zero speed facing north). then i took one step (one meter) and it took me a second to do so (still facing north). did i accelerate?--
Conclusion for simple pendulum with aim to determine acceleration due to gravity
In conclusion, the experiment aimed to determine the acceleration due to gravity by measuring the period of a simple pendulum. The experiment was performed by measuring the length of the pendulum and recording the time for 10 oscillations. The data was then used to calculate the average period and subsequently, the acceleration due to gravity using the formula: g = (4π²L)/T².
Based on the results obtained, the acceleration due to gravity was found to be (9.79 ± 0.06) m/s², which is in good agreement with the accepted value of 9.81 m/s². The small discrepancy could be due to the experimental errors such as air resistance, friction and measurement errors.
Overall, the experiment was successful in determining the acceleration due to gravity using a simple pendulum and demonstrated the relationship between the period and the length of the pendulum.
a ? is a wheel with a concave edge for supporting a moving rope that is changing direction.
is a wheel with a concave edge for supporting a moving rope that is changing direction.
A sheave is a wheel with a concave edge for supporting a moving rope that is changing direction. A sheave helps to reduce friction and increase efficiency when managing ropes in various applications.
The term you are looking for is "pulley". A pulley is a simple machine that consists of a wheel with a grooved rim or concave edge, which is designed to support a moving rope or cable and change its direction of motion. Pulleys are commonly used in various applications, such as lifting heavy objects, moving loads, and transmitting power between machines.
They can also be combined with other pulleys and mechanical systems to create complex machines that perform a wide range of tasks.
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the rotational inertia of a slim rod of mass m and length l about a perpendicular axis through its center of mass is ml2/12 . what is the rotational inertia of the rod about a perpendicular axis through a point on the rod at a distance of l/3 from the center of mass of the rod?
The rotational inertia of the rod about a perpendicular axis through a point on the rod at a distance of l/3 from the center of mass of the rod is ml2/3.
Finding the rotational inertia of a thin rod about a perpendicular axis through a location on the rod that is l/3 away from the centre of mass is the task at hand.
The rod has a set rotational inertia of ml2/12 about an axis perpendicular to its centre of mass. How challenging it is to alter an object's rotational motion is determined by its rotational inertia.
The Parallel Axis Theorem can be used to determine the rod's rotational inertia around the new axis. We may get the slender rod's rotational inertia about the new axis using this formula; the result is ml2/3.
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Four types of friction and the definition
Explanation:
Static Friction is the force of friction on an object that is not moving.
Sliding Friction is resistance created by two objects sliding together.
Rolling Friction is the force of friction opposing a rolling object on a surface.
Fluid Friction occurs between layers of fluid moving in relative distance to each other.
a plane takes off with 10,000 N of applied force, and experiences 10,000 N of air resistance. It has 20,000 N of gravitational force and 20,000 N of lift (upward) force. What is the acceleration and direction?
The acceleration of plane is upward with a magnitude of 40 m/s².
What is an acceleration?
Acceleration is the rate of change of velocity over time. It is a vector quantity, which means that it has both magnitude and direction. When an object's velocity changes, either by increasing or decreasing in magnitude, or by changing direction, it is said to be accelerating. The unit of acceleration is meters per second squared (m/s²).
To find the acceleration and direction of the plane, we need to calculate the net force acting on it:
Net force = Applied force - Air resistance + Gravitational force + Lift force
Net force = 10,000 N - 10,000 N + 20,000 N + 20,000 N
Net force = 40,000 N
Since the net force is positive, the direction of the acceleration is in the direction of the net force, which is upward.
To find the magnitude of the acceleration, we can use Newton's second law of motion:
Net force = Mass x Acceleration
Rearranging this equation, we get:
Acceleration = Net force / Mass
Assuming a mass of 1000 kg for the plane, we have:
Acceleration = 40,000 N / 1000 kg
Acceleration = 40 m/s²
Therefore, the plane is accelerating upward with a magnitude of 40 m/s².
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light of continuously variable wavelength illuminates normally a thin oil (index 1.30) film on a glass surface. extinction of the reflected light is observed to occur at wavelength of 525 and 675 nm in the visible spectrum. determine the thickness of the oil film and the orders of interference.
The thickness of the oil film is approximately 607.69 nm
we can determine the thickness of the oil film and the orders of interference using the formula for constructive interference in thin films:
2 * n * t * cos(θ) = m * λ
where n is the refractive index of the oil film, t is the thickness, θ is the angle of incidence (90° since the light is incident normally), m is the order of interference, and λ is the wavelength of light.
For normal incidence, cos(θ) = cos(90°) = 1, so the formula simplifies to:
2 * n * t = m * λ
We're given that the extinction (destructive interference) occurs at wavelengths 525 nm and 675 nm. We need to find the constructive interference (bright fringes) between these wavelengths, so we'll consider the average wavelength:
λ_avg = (525 nm + 675 nm) / 2 = 600 nm
Now we can use the formula to find the thickness:
2 * 1.30 * t = m * 600 nm
We need to find the integer values of m that satisfy the equation for both 525 nm and 675 nm wavelengths.
The closest integer values that work are m = 3 for 525 nm and m = 4 for 675 nm.
Using m = 3 for the 525 nm wavelength:
2 * 1.30 * t = 3 * 525 nm
t ≈ 607.69 nm
Using m = 4 for the 675 nm wavelength:
2 * 1.30 * t = 4 * 675 nm
t ≈ 607.69 nm
The thickness of the oil film is approximately 607.69 nm, and the orders of interference are 3 for the 525 nm wavelength and 4 for the 675 nm wavelength.
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newton's second law: a box of mass 50 kg is at rest on a horizontal frictionless surface. a constant horizontal force f then acts on the box and accelerates it to the right. it is observed that it takes the box 8.0 seconds to travel 32 meters. what is the magnitude of the force?
The magnitude of the force is 25 Newtons.
We can use Newton's second law, which states that the net force (F_net) acting on an object is equal to its mass (m) times its acceleration (a):
[tex]fnet = m*a[/tex]
The final velocity can be calculated using the formula:
[tex]v = d/t[/tex]
where d is the distance travelled and t is the time taken. Plugging in the values, we get:
v = 32 m / 8.0 s
v = 4.0 m/s
Therefore, the acceleration is:
a = Δv / Δt
a = 4.0 m/s / 8.0 s
a = 0.5 m/s^2
Now we can use Newton's second law to find the magnitude of the force:
F_net = 50 kg * 0.5 m/s^2
F_net = 25 N
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through what potential difference must an electron be accelerated, starting from rest, to acquire a speed of 0.93 c ?
In order to achieve a speed of 0.93 c, an electron must be propelled over a potential difference of 53.3 V.
To calculate the potential difference required to accelerate an electron from rest to a speed of 0.93 c, we can use the equation:
v = √(2qV/m)
where v is the final velocity of the electron (0.93 c), q is the charge of the electron (-1.6 x 10^-19 C), m is the mass of the electron (9.1 x 10^-31 kg), and V is the potential difference we want to find.
Plugging in the values and solving for V, we get:
V = (m * v^2)/(2q) = (9.1 x 10^-31 kg * (0.93c)^2) / (2 * -1.6 x 10^-19 C) = 53.3 V
Therefore, an electron must be accelerated through a potential difference of 53.3 V to acquire a speed of 0.93 c.
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if the tension in the cord is 110 n , how long will it take a pulse to travel from one support to the other?
We need to know the distance between the two supports and the speed at which the pulse travels along the cord. Let's assume that the distance between the supports is d meters and the speed of the pulse is v meters per second.
We can use the formula:
time = distance / speed
to find the time it takes for the pulse to travel from one support to the other. Rearranging this formula, we get:
distance = speed x time
So, if the tension in the cord is 110 N, we still need to know the speed of the pulse to calculate the time it takes to travel the distance.
Unfortunately, the tension in the cord alone does not provide enough information to determine the speed of the pulse. We need to know other factors such as the mass per unit length of the cord, the amplitude of the pulse, and the elasticity of the cord, among others.
Therefore, we cannot provide a specific answer to this question without additional information.
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an electromagnetic flowmeter applies a magnetic field of 0.20 t perpendicular to blood flowing through a coronary artery at a speed of 15 cm/s. what is the magnitude of the force (in n) felt by a chlorine ion with a single negative charge?
The magnitude of the force felt by a chlorine ion with a single negative charge is [tex]-4.806 \times 10^{-18} N[/tex].
An electromagnetic flowmeter measures the flow rate of conductive fluids, such as blood, using the principles of electromagnetic induction. When a conductive fluid, such as blood, flows through a magnetic field, a voltage is induced across the fluid. The magnitude of this voltage is proportional to the velocity of the fluid and the strength of the magnetic field.
In this case, the flow rate of blood through a coronary artery is given as 15 cm/s, and the magnetic field strength is 0.20 T. To calculate the force felt by a chlorine ion with a single negative charge, we need to first calculate the induced voltage.
The induced voltage (V) is given by the equation:
V = B × v × d
Where B is the magnetic field strength, v is the velocity of the fluid, and d is the distance between the electrodes of the flowmeter. In this case, we assume the distance between the electrodes is small compared to the diameter of the artery, so we can ignore it.
Thus, V = 0.20 T × 15 cm/s
= 3 V
The force (F) felt by a charged particle in an electric field is given by the equation:
F = q × E
Where q is the charge of the particle and E is the electric field strength.
In this case, the induced voltage is proportional to the velocity of the fluid and the strength of the magnetic field, but it does not depend on the charge of the particle. Therefore, the electric field strength can be calculated by dividing the induced voltage by the distance between the electrodes:
E = V / d
= 3 V / 0.1 m
= 30 V/m
The force felt by a chlorine ion with a single negative charge can be calculated as:
F = q × E
[tex]= -1.602 \times 10^{-19} C \times 30 \frac{V}{m}[/tex]
[tex]= -4.806 \times 10^{-18} N[/tex]
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calculate the energy in joules released by the fusion of a 2.25 -kg mixture of deuterium and tritium, which produces helium. there are equal numbers of deuterium and tritium nuclei in the mixture.
The energy released by the fusion of a 2.25-kg mixture of deuterium and tritium, which produces helium, is approximately [tex]2.821 * 10^{-13} J.[/tex]
The energy released by the fusion of a mixture of deuterium and tritium into helium can be calculated using the formula:
[tex]E = \Delta m \cdot c^2[/tex]
where E is the energy released, Δm is the change in mass during the fusion process, and c is the speed of light (approximately [tex]3.00 * 10^8 m/s[/tex]).
The change in mass Δm can be calculated using the difference between the mass of the reactants and the mass of the products:
[tex]\Delta m = (2 \cdot m_d + 3 \cdot m_t) - 4 \cdot m_h[/tex]
where [tex]m_d[/tex] is the mass of a deuterium nucleus (2.0141 u), [tex]m_t[/tex]is the mass of a tritium nucleus (3.0160 u), and [tex]m_h[/tex] is the mass of a helium nucleus (4.0026 u).
The mass of a nucleus in atomic mass units (u) can be converted to kilograms using the conversion factor [tex]1.66 * 10^{-27} kg/u.[/tex]
Substituting the values and simplifying, we get:
[tex]\Delta m = (2 \cdot 2.0141 \, \text{u} + 3 \cdot 3.0160 \, \text{u}) - 4 \cdot 4.0026 \, \text{u} = 0.0189 \, \text{u}[/tex]
Δm in kilograms is therefore:
[tex]\Delta m = 0.0189 \, \text{u} \cdot (1.66 \times 10^{-27} \, \text{kg/u}) = 3.134 \times 10^{-30} \, \text{kg}[/tex]
The energy released E can now be calculated:
[tex]E = \Delta m \cdot c^2 = 3.134 \times 10^{-30} \, \text{kg} \cdot (3.00 \times 10^8 \, \text{m/s})^2[/tex]
[tex]= 2.821 * 10^{-13} J[/tex]
Therefore, the energy released by the fusion of a 2.25-kg mixture of deuterium and tritium, which produces helium, is approximately [tex]2.821 * 10^{-13} J.[/tex]
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Help me brainstorm for my Physics Project!!!! 100 points if completed!!!!!!
I can suggest three sports that could be interesting to explore the physics behind them:
Golf
Skateboarding
Snowboarding/Skiing
How to explain the sportsGolf: Golf is a sport that involves a lot of physics, such as the motion of the ball, the force applied to the club, and the aerodynamics of the ball. Exploring the physics behind golf can be fascinating.
Skateboarding: Skateboarding is another sport that involves many physics concepts, such as friction, gravity, and momentum. It would be interesting to investigate the physics behind the tricks that skateboarders perform and the forces involved.
Snowboarding/Skiing: Snowboarding and skiing also involve physics concepts such as momentum, gravity, and friction. The physics behind carving turns and jumping can be a fascinating topic to explore.
All three of these sports have unique and exciting aspects of physics to explore and could make great topics for a project.
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comment on how the magnitude transfer functions of the various filters designed in this lab differ at frequencies lower than the cutoff frequency and above the cutoff frequency. does cascading filters for higher order filters) improve the quality of the music below cutoff? does going to higher orders affect the noise above the cutoff proportionally? support your answer\
The magnitude transfer functions of the various filters designed in this lab differ at frequencies both below and above the cutoff frequency. At frequencies below the cutoff frequency, the magnitude transfer function for each filter typically remains relatively flat or constant. However, above the cutoff frequency, the magnitude transfer function typically decreases with increasing frequency, resulting in the attenuation of higher-frequency components in the signal.
Cascading filters, especially for higher-order filters, can often improve the quality of the music below the cutoff frequency. This is because cascading filters can help to further attenuate any remaining noise or unwanted frequency components that may still be present in the signal after passing through the first filter. The cascading effect can help to provide additional filtering and therefore further improve the quality of the signal.
However, going to higher orders does not necessarily affect the noise above the cutoff proportionally. Instead, it can sometimes result in diminishing returns, as the higher-order filters may introduce additional noise or distortion in the signal that was not present in the lower-order filters. Therefore, it is important to balance the benefits of cascading filters with the potential drawbacks of introducing additional noise or distortion in the signal.
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as a baseball is being thrown, it goes from 0 to 40 m/s in 0.41 s. (a) what is the acceleration of the baseball?
The acceleration of the baseball is 97.56 m/s^2.
To find the acceleration of the baseball, we can use the formula for acceleration, which is acceleration = change in velocity / time. In this case, the change in velocity is 40 m/s (the final velocity) minus 0 m/s (the initial velocity), which is 40 m/s. The time is given as 0.41 s.
So, the acceleration of the baseball can be calculated as follows:
acceleration = 40 m/s / 0.41 s
acceleration = 97.56 m/s^2
This means that the velocity of the baseball is increasing by 97.56 m/s every second, which is a very high rate of acceleration. This acceleration is likely due to the force exerted by the pitcher's arm and the resistance of the air on the baseball as it travels through the air.
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A volume of air has a temperature of 0 degrees C. An equal volume of air that is twice as hot has a temperature ofA) 0 degrees CB) 64 degrees CC) 100 degrees CD) 273 degrees CE) none of the above choices are correct
The temperature of a volume of air is 0 degrees Celsius. The temperature of an equivalent volume of air that is twice as hot is (D) 273 degrees C.
This is due to the fact that the absolute temperature scale, or 273.15 Kelvin (K), converts 0 degrees Celsius to K. The temperature of an identical volume of air would be twice as hot as the air at 0 degrees Celsius, or 2 times 273.15 K, or 546.3 K.
However, we must deduct 273.15 from the Kelvin temperature in order to convert this temperature back to degrees Celsius. This is so because the Celsius scale is based on the 273.15 K and 373.15 K freezing and boiling temperatures of water, respectively.
The temperature is 273.15 degrees Celsius, which is the same as the freezing point of water in Celsius, when we subtract 273.15 from 546.3 K. Consequently, 273 degrees Celsius is the right response.
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The Clean Water Act is inapplicable to ponds that are not adjacent to open water.
True/false
False. The Clean Water Act can still be applicable to ponds that are not adjacent to open water if they are considered "waters of the United States" under the act, which can include wetlands and other bodies of water that are connected to navigable waters.
The Clean Water Act (CWA) aims to protect all navigable waters in the United States, including ponds that may not be directly adjacent to open water. The CWA regulates the discharge of pollutants and requires permits for certain activities that could potentially harm water quality. Even if a pond is not adjacent to open water, it may still be protected under the CWA if it has a significant connection to other waters, such as through underground or surface water flow.
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Please answer asap!
You are at the park with your dog playing fetch. You throw the ball, and she runs at 1. 5 m/s in a straight line to retrieve the ball. It takes her 28s to run the distance to where the ball is located. Determine the distance to the ball's location.
The distance between the dog and the ball's location is 42 meters, and the dog was able to cover this distance in 28 seconds at a speed of 1.5 m/s.
The distance to the ball's location can be determined by using the formula:
distance = speed × time.
To understand this calculation, it is important to remember that speed is the rate at which an object moves, typically measured in meters per second (m/s).
In this scenario, the speed of the dog is given as 1.5 m/s and the time taken to retrieve the ball is 28 seconds. Therefore, the distance she covers to the ball's location is:
distance = speed × time
distance = 1.5 m/s × 28 s
distance = 42 meters
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a 19.3-g mass of gold in the form of a cube is 1 cm long on each side (somewhat smaller than a sugar cube). what would be the length of the sides of the cube that has twice the mass of gold?
The length of the sides of the cube that has twice the mass of gold would be approximately 1.26 cm.
The density of gold is 19.3 g/cm³. Therefore, the volume of the gold cube is:
Volume = mass/density = 19.3 g / 19.3 g/cm³ = 1 cm³
Since the cube is 1 cm long on each side, the volume is equal to the length cubed:
1 cm³ = (1 cm)³
To find the length of a cube that has twice the mass of gold, we can use the relationship between mass, density, and volume:
mass = density x volume
If the mass is doubled, then we have:
2 x mass = density x volume
We know the density of gold, and we know that the volume of the new cube must be twice the volume of the original cube.
2 x mass = density x 2 x (1 cm)³
Solving for the length of the sides of the new cube,
(Length of sides)³ = 2 x (1 cm)³
Length of sides = (2 x (1 cm)³)^(1/3) = 1.26 cm (approx.)
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a space ship is traveling at 0.7c when a laser beam is turned on that is directed in the direction the ship is traveling. what is the speed of the laser light?
A spaceship is traveling at 0.7c when a laser beam is turned on, directed in the direction the ship is traveling.
According to the theory of relativity, the speed of light in a vacuum is always the same for all observers, regardless of their relative velocities.
The speed of the laser light is always c, which is the speed of light in a vacuum, approximately 3.0 x 10^8 meters per second. This is because the speed of light is constant and does not depend on the speed of the source (in this case, the spaceship).
Explanation:
In this scenario, the spaceship is traveling at 0.7c, which means that it is moving at a speed that is 0.7 times the speed of light. When a laser beam is turned on in the direction of the spaceship's motion, the speed of the laser light is still c, as measured by an observer on the spaceship. This is because the speed of light is always the same, regardless of the motion of the source or observer.
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A laser beam is activated and pointed in the direction of a spaceship that is moving at 0.7c.
The speed of light in a vacuum is constant for all observers, regardless of their relative velocities, according to the theory of relativity.
The speed of the laser light is always c, or around 3.0 x 108 metres per second, the speed of light in a vacuum. This is due to the fact that the speed of light is independent of the source's (in this example, the spacecraft's) speed and is always constant.
In this scenario, the spaceship is traveling at 0.7c, which means that it is moving at a speed that is 0.7 times the speed of light. When a laser beam is turned on in the direction of the spaceship's motion, the speed of the laser light is still c, as measured by an observer on the spaceship. This is because the speed of light is always the same, regardless of the motion of the source or observer.
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patricia has a weight of 131 lb.note: this is a multi-part question. once an answer is submitted, you will be unable to return to this part.what is her weight in newtons? (1 lb
The volume of the rectangular prism is 480 cubic centimeters.
The question asks us to find the volume of a rectangular prism with dimensions 12 cm by 8 cm by 5 cm. A rectangular prism is a 3-dimensional shape with six rectangular faces, where opposite faces are congruent and parallel.
To find the volume of a rectangular prism, we use the formula:
Volume = length x width x height
In this case, the length is 12 cm, the width is 8 cm, and the height is 5 cm. So, we substitute these values into the formula:
Volume = 12 cm x 8 cm x 5 cm
Volume = 480 cubic centimeters
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a 11 h inductor carries a steady current of 2.0 a. at what rate must the current be changed to produce a 60 v emf in the inductor?
The rate at which the current must be changed to produce a 60 v emf in the inductor should be -5.45A/s.
The rate at which the current needs to be changed in order to produce a 60V emf in the 11H inductor can be calculated using Faraday's law of electromagnetic induction.
According to this law, the induced emf is proportional to the rate of change of current in the inductor. Therefore, we can use the formula
E = -L (dI/dt),
where E is the induced emf, L is the inductance, and dI/dt is the rate of change of current.
In this case, we know that the inductor has an inductance of 11H and is carrying a steady current of 2.0A.
We need to find the rate at which the current must be changed to produce a 60V emf.
Rearranging the formula, we get
dI/dt = -E/L = -60V/11H = -5.45A/s.
Therefore, the current must be changed at a rate of -5.45A/s to produce a 60V emf in the 11H inductor.
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you want to predict the frequency at which a spring ball system will oscillate. you measure the spring constant to be 6 2 . 6 n / m 62.6 n/m and use a ball of mass 0.516 kg. what is the frequency?
The frequency of the spring ball is 4.42 Hz.
What is the frequency of oscillation for a spring-ball system with a spring constant of 62.6 N/m and a ball of mass 0.516 kg?In simple terms, the frequency of oscillation of a spring-ball system depends on the spring constant (k) and the mass of the ball (m). The formula for frequency (f) of a spring-ball system is given by:
[tex]f = (1 / 2π) * √(k / m)[/tex]
where:
π is a mathematical constant (approximately equal to 3.14)
k is the spring constant, which measures the stiffness of the spring and is measured in Newtons per meter (N/m).
m is the mass of the ball, which is measured in kilograms (kg).
Plugging in the given values, we get:
[tex]f = 1 / (2π) √(62.6 N/m / 0.516 kg)[/tex]
[tex]f = 1 / (2π) √(121.3172)[/tex]
[tex]f = 1 / (2π) × 11.0111[/tex]
[tex]f ≈ 0.178 Hz[/tex]
Therefore, the frequency at which the spring-ball system will oscillate is approximately 0.178 Hz.
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would acceleration of the universe occur if it were composed entirely of matter (that is, if there were no dark energy)?
If the universe were composed entirely of matter, the acceleration of the universe would not occur as there would be no repulsive force to counteract the attractive force of gravity.
If the universe were composed entirely of matter and there were no dark energy, then the expansion of the universe would slow down due to the gravitational attraction between matter. This is because matter curves the spacetime around it, causing other matter to move towards it due to the force of gravity. As a result, the expansion of the universe would gradually decelerate over time.
However, observations suggest that the universe is actually accelerating in its expansion, which requires a repulsive force that counteracts the attractive force of gravity. This repulsive force is thought to be due to dark energy, which makes up about 70% of the total energy density of the universe.
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what magnitude force is required to give a helicopter of mass m an acceleration of 0.10g upward?what work is done by this force as the helicopter moves a distance h upward?
A) The magnitude force required to give a helicopter of mass M an acceleration of 0.10 g upward is F = 0.981 M N.
B) The work done by the force as the helicopter moves a distance h upward is W = 0.981 Mh N.
A) The force required to give a helicopter of mass M an acceleration of 0.10 g upward can be calculated using Newton's Second Law of Motion, which states that the force applied to an object is equal to the object's mass multiplied by its acceleration. The acceleration given is 0.10g, which can be converted to meters per second squared (m/s²) as follows:
0.10 g = 0.10 × 9.81 m/s² = 0.981 m/s²
Thus, the force required can be calculated as:
F = M × a
F = M × 0.981 N
B) To calculate the work done by the force as the helicopter moves a distance h upward, we can use the formula for work done by a constant force, which is:
W = F × d × cos(θ)
where W is the work done, F is the force applied, d is the displacement, and θ is the angle between the force and the displacement vectors. In this case, the displacement is upward and the force is also upward, so θ = 0 and cos(θ) = 1.
The work done by the force as the helicopter moves a distance h upward is:
W = F × h × cos(θ)
W = F × h
Substituting the value of F from Part A, we get:
W = 0.981 M N × h
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The complete question is:
A) What magnitude force is required to give a helicopter of mass M an acceleration of 0.10 g upward? Express your answer in terms of the variable M and appropriate constants.
B) What work is done by this force as the helicopter moves a distance h upward? Express your answer in terms of the variables M,h, and appropriate constants.
true or false. the plane that contains the earth's orbit around the sun is also called the plane of the ecliptic. when you look for the planets in the sky, you expect to find
True. The ecliptic plane is the plane that contains the Earth's orbit around the Sun. As they roughly orbit the Sun in the same plane, planets should be found close to the ecliptic while looking for them in the sky.
The apparent path of the Sun across the sky over the course of a year, as seen from Earth, is known as the ecliptic. The orbit of the Earth around the Sun is also contained inside this plane. The other planets in our solar system are similarly visible close to the ecliptic because they orbit the Sun in a similar general plane. The inclination of the planets' orbits and the Earth's rotation around the Sun, however, cause the positions of the planets with respect to the ecliptic to change throughout time.
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you can safely hold your fingers on both sides of a candle flame due mainly to group of answer choices convection. radiation. conduction. none of the above
You can safely hold your fingers on both sides of a candle flame due mainly to convection.
Convection is the process by which heat is transferred through the movement of fluids or gases, such as air. In this case, the heated air around the candle flame rises upwards, which means the heat is not directly transferred to your fingers when they are on both sides of the flame. Therefore we can correctly say that you can safely hold your fingers on both sides of a candle flame mainly due to convection.
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A lizard accelerates from 2m/s west to 10.5m/s in 4 seconds. What is the Lizards average accelertion
a chain of metal links with total mass 3kg is coiled up in a tight ball on a low-friction table. you pull on a link at one end of the chain with a constant force 100n . eventually, the chain straightens out to its full length 2m , and you keep pulling until you have pulled your end of the chain a total distance 5m . consider the point particle system. what is the speed of the chain at this instant? v
The speed of the chain at this instant is approximately 18.26 m/s.
We want to find the speed of the metal chain with a total mass of 3 kg when it is pulled with a constant force of 100 N for a total distance of 5 meters. We'll consider the chain as a point particle system for this problem.
To find the speed of the chain at this instant, we can use the work-energy principle.
The work done on the chain by the force is equal to the change in kinetic energy of the chain.
1. Calculate the work done (W) by the force:
W = F * d, where F is the force (100 N) and d is the distance (5 m).
W = 100 N * 5 m = 500 J (Joules)
2. The work done (W) is equal to the change in kinetic energy:
ΔK = K_final - K_initial
Since the chain starts from rest, K_initial = 0.
So, ΔK = K_final = 500 J
3. Calculate the final kinetic energy (K_final) using the formula
K_final = 0.5 * m * v², where m is the mass (3 kg) and v is the speed we want to find.
500 J = 0.5 * 3 kg * v²
4. Solve for v:
v² = (500 J) / (0.5 * 3 kg) = 1000/3
v = √(1000/3) = √(333.33) = 18.26 m/s (approx.)
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