Match each term with its description or example.

element

compound

ion

isotopes

cation

anion
a.
na+ and cl- are examples
b.
mg2+ is an example
c.
two different types of atoms combined in a fixed ratio
d.
two atoms with the same number of protons but a different number of neutrons
e.
br- is an example
f.
atoms of iron are an example

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

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.

Brutus, the dog, is pulling a bone to the left with a force of 20 n. lassie, another dog, is pulling a bone to the right with a force of 18n. what is the net force? a. b. c.