Before the cells in a person's body can use the food that the person eats, the food must be a. chemically broken down into sugar. b. chemically changed into heat. c. physically changed into a solid. d. physically heated to 100°c.

Distinguish between a transverse wave and a longitudinal wave.

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.

If the new moon happens on january 15th, what shape will it be on february 6th?