(a) for an ideal plane electromagnetic wave in vacuum, show that the energy crossing an area a in 1 second, with a normal to the direction of propaga- tion, is equal to the total field energy within a cylinder with base a and height 3 x 108 m. (b) show that cuav and explain this result in terms of conservation of energy.

because it says use -2,0,and 2 for x, we can plug those numbers into the equation. y/4=3/4(-2)+2   y/4= -1 1/2 +2 now to get x by itself, we can multiply each side by 4. y=-6+8 which equals y=2 when x=-2. now you can do the same thing with 0 and 2 as x. you get y=8 when x=0 and y=14 when x=2.

x   |   y

-2 |   2

0   |   8

2   |   14

the correct choice is a .

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the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr