She does 200J .
We know she uses 20N of force and 10m is the distance. We multiply both numbers and we are given our answer of 200J. Hope this was helpful. :)
Answer:

Explanation:
The Planck Eistein relation, states that the energy of a photon is proportional to its frequency:

h is the Plank constant.The frequency of a photon is defined as the speed of light over its wavelength:

Replacing (2) in (1):

Earth's original atmosphere was probably just hydrogen and helium, because these were the main gases in the dusty, gassy disk around the Sun from which the planets formed. The Earth and its atmosphere were very hot.