5. A new type of hoverboard has been designed to levitate over a copper surface. The developers had a skateboard icon test out the hoverboard on a copper halfpipe.
What type of field is responsible for levitating the hoverboard and rider as it
traverses the half pipe?

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.

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?