An electromagnetic wave is traveling in a vacuum. The magnitudes of the electric and magnetic fields of the wave are , and the electric and magnetic energies carried by the wave are . proportional (but not equal) to each other, unequal equal, proportional (but not equal) to each other proportional (but not equal) to each other, equal equal, equal

Explanation:

The relation between the magnitudes of the electric and magnetic fields of the wave is given by :

c is speed of light

E and B are electric and magnetic field

So, the magnitudes of the electric and magnetic fields of the wave are proportional to each other.

Also, the wave carries same magnitudes of the electric and magnetic fields of the wave.

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000