8 ASSESSMENT QUESTIONS:
1. An apple has a mass of 297 grams. How many kilograms is this? (Note: You can use the information in the table below to make a conversion factor.)
Symbol
K
Meaning
1,000
Prefix
kilo-
hecto-
deci
100
h
d
centi-
c
milli
m
1/10
1/100
1/1,000
1/1,000,000
1/1,000,000,000
micro
nano-
n
O A.0.297 kg
O B.29.7 kg
O c.2970 kg
O D. 297.000 kg

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.

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

The slope of a velocity time graph over any interval of time gives the during that interval