What allows a tightrope walker to walk across the rope?
tension
air resistance
friction
magnetic force
isabella pushes a box with a force of 20 n. it accelerates at 2 m/s/s. what is the mass of the box?
10 kg
40 kg
22 kg
cannot be determined

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

If a sphere and a cure have the same mass and are propelled up a ramp with the same force, which would travel father up the ramp? explain.

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.