The suspended 2.68 kg mass on the right is moving up, the 2.8 kg mass slides down the ramp, and the suspended 9 kg mass on the left is moving down. There is friction between the block and the ramp. The acceleration of gravity is 9.8 m/s^2 . The pulleys are massless and frictionless. Required:
What is the tension in the cord connected to the 8 kg block?

Suppose that an electromagnetic wave which is linearly polarized along the x−axis is propagating in vacuum along the z−axis. the wave is incident on a conductor which is placed at z > 0 region of the space. the conductor has conductivity σ, magnetic permeability µ and electric permittivity ε. (a) find the characteristic time for the free charge density which dissipates at the conductor. (b) write the maxwell equations and derive the wave equation for a plane wave propagating in a conductor. (c) find the attenuation distance at which the incident amplitude reduces to e ^−1 of its initial value. (d) find the electric and magnetic fields inside the conductor. 8 (e) find the power loss per area of the incident electromagnetic wave at the surface of conductor.

What will a positive and a negative charge do if they are separated from each other?

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?