I hypothesis that with the assumption that nights being colder and a soccer ball in front of sunlight being hot that nights would be much air condense giving the look of deflation where as sunlight could even expand the air but normally not as noticable as the cold condensing ball.
And for an experiment you could fill a balloon or ball with room temp. air and freeze it over night and then the next day expose it to sunlight for a couple of hours and compare both results
Answer:
Because they are both easy to measure (?)
Explanation:
(I'm not really sure, there are no choices. If there were different options I might be able to better answer this)
The average kinetic energy of an atom in helium gas at temperature T is given by,
K.E=
here, K is botzmann constant =1.38×10⁻²³ m² kg s⁻² K⁻¹
Given, K.E= 6.21×10⁻²¹ J
Substituting the values,

T= 300 K
Therefore, at temperature 300 K the average kinetic energy of the atom in helium gas is 6.21×10⁻²¹ J.