12,762 Answered Questions for the topic physics

Physics

06/05/22

A particle under double-exponential potential
A particle of mass m is constrained to move along the x-axis. It's potential energy is given by: U(x) = U0 [ e−2β(x−x0) − 2e−β(x−x0) ] where U0, β, and x0, are known parameters.a) Assume that the... more
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Physics

06/04/22

A particle under double-exponential potential
A particle of mass m is constrained to move along the x-axis. It's potential energy is given by: U(x) = U0 [ e−2β(x−x0) − 2e−β(x−x0) ] where U0, β, and x0, are known parameters.a) Assume that the... more
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Physics Mathematics

06/04/22

How to find the angle and resultant force of three forces for a particle in equilibrium?
A particle in equilibrium has three forces of magnitudes 5N, 6N and F N acting in it in the horizontal plane in the directions ( sorry it looks like I can’t attach a pic but the 5N is acting... more
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Physics

06/03/22

Pendulm Damping
A 93.0 cm pendulum is released from a small angle. After 103 oscillations the amplitude is one half of its original value. The damping is proportional to the speed of the pendulum bob.Find the... more
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Physics

06/03/22

Centripetal Acceleration

Tamir drives his car around a circular section of a road having a radius of 20 meters at a constantspeed of 10 m/s. What is the centripetal acceleration of Tamir's car?
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06/03/22

A hypothetical material has a relative permeability and relative permittivity of 3.0 and 4.0, respectively.

A hypothetical material has a relative permeability and relative permittivity of 3.0 and 4.0, respectively. a. What is the speed of light in this material? b. What is the value of the magnetic... more
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Physics

06/02/22

Physics... Electricity
A 4N force acts between two equal charge separated by a distance d.  What will be the new force if the magnitude of each of the two charges are doubled but the distance remains the... more
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Physics

06/01/22

A scale reads 380 N when a piece of nickel is hanging from it. What does it read (in N) when it is lowered so that the nickel is submerged in water?
A scale reads 380 N when a piece of nickel is hanging from it. What does it read (in N) when it is lowered so that the nickel is submerged in water?
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Physics

06/01/22

Gravitational Slingshot
A satellite of mass ms and speed vs,i circles around a planet of mass mp that is moving with speed vp,i in the opposite direction.Since gravity is a conservative force, the collision is... more
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Physics

06/01/22

Work Done on an Incline (highschool level)
A girl pushes a 20.0 kg box, initially at rest, up a friction-less 10.0m long ramp inclined 30.00 degrees above the horizontal. If the final velocity of the box at the top of the ramp is 1.00 m/s,... more
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05/31/22

Please help me understand
Can you explain or give an example of why the frequency of light does not change upon reflection
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Physics Calculus

05/31/22

free fall motion
2 engineering students are exploring motion of body along a straight line using calculus-based physics performing a lot of experiments. One of the students, is at the 5th floor of the building,... more
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Physics Chemistry

05/31/22

Why did water become cold in a vacuum?
Water was placed into a container. The container was then vacuumed sealed and the temperature monitored. Why did the temperature of the water drop once the vacuum sealing took place?
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Physics

05/31/22

Spring constant

A spring have a constant of 340n/m . How much force is required to compress it 0.5 m?
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05/30/22

Why does folding a piece of paper allow it to hold more weight?
In this video: https://youtu.be/Ra_LM93R-Lk ,why does folding up the sides of the paper to make thicker walls on the bridge make the bridge so much stronger?
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05/30/22

Why does folding a piece of paper allow it to hold more weight?
In this video: https://youtu.be/Ra_LM93R-Lk ,why does folding up the sides of the paper to make thicker walls on the bridge make the bridge so much stronger?
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Physics

05/29/22

momentum and impulse
A solid block of mass m2 = 3.3 kg, at rest on a horizontal frictionless surface, is connected to a relaxed spring. The other end of the spring is fixed, and the spring constant is k = 60 N/m.... more
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05/28/22

Calculate the cell potential of the electrolytic cell
Calculate the cell potential of the electrolytic cell, identify the anode and the cathode and write thebalanced equation for the overall cell reaction that occurs according to the reaction shown... more
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05/27/22

Determine if the reaction is spontaneous or not:
a. 3 Li + Al ⟶ 3 Li + Al3+ E ̊ = - 1.39 V
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Physics

05/26/22

physics question
The initial velocity of a military jet is 210 m/s eastward. The pilot ignites the afterburners, and the jet accelerates eastward at a constant rate for 1.70 s. The final velocity of the jet... more
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Physics

05/25/22

A worker at the top of a 380-m-tall television transmitting tower accidentally drops a heavy tool. If air resistance is negligible, how fast (in m/s) is the tool going just before it hits the ground?
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Physics

05/25/22

Moment of inertia

A wagon wheel is a thin metal ringof mass 57.1 kg and radius 0.530m. What is its moment of inertia?[?] kg-m²can someone please answer this thourghly ?
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Physics

05/25/22

(a) Find the tension in the string connecting masses M1 and M2. (b) Find the tension in the string connecting masses M2 and M3.
A hanging mass, M1 = 5 kg, is attached by a light string that runs over a frictionless pulley to the front of a mass M2 = 3.5 kg that is initially at rest on the table. A third mass M3 = 4 kg,... more
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Physics

05/25/22

potential energy
A particle of mass 1.1 kg moves under the influence of a potentialU(x) = a/x + bx (a=3 and b=2.5). The particle's motion is restricted to the region x>0.the force acting on the particle is a/x^2... more
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Physics

05/25/22

A football coach sits on a sled while two of his players build their strength by dragging the sled

A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes. The friction force on the sled is 1.2  and the angle between the two... more
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