The electromagnetic wave that delivers a cellular phone callto
a car has a magnetic field with an rms value of 1.5x10^-10 t. the
waves passes perpendicularly through an open window, the areaof
which is 0.20m^2. how much energy does this wave carry throughthe
windown during a 45s phone call? p=energy/time.

Explanation:

The intensity of an electromagnetic wave can be expressed in terms of the magnetic field using the next relationship:

(1)

Now, let's define the relationship between power (P) and average intensity (I).

So we can calculate the power.

Finally, energy is the product of P times time, so:

I hope it helps you!

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.