A 1.50 x 103 kg car traveling at 100 km/h South collides with a 1.20 x 103 kg car traveling North at 100 km/h. The heavier car continues to move South after
the collision, but slows to 25.0 km/h. How fast is the lighter car moving after the
collision?

Why is metal often used for cooking pan?

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.

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.