Here refrigerator removes 55 kcal heat from freezer
Refrigerator releases 73.5 kcal heat to surrounding
So here we can use energy conservation principle by II Law of thermodynamics
the law says that
here we know that
= heat released to the surrounding
= heat absorbed from freezer
W = work done by the compressor
now using above equation we can write
So here compressor has to do 18.5 k cal work on it
<span>KE = 1/2 * m * v^2 = 1/2 * 30 * 20^2 = 1/2 * 30 * 400 = 6000 J</span>
A common application of the wave/particle duality of ligt is in the technology of the solar panel.
<h3>Photoelectric effect</h3>
One of the greatest breakthroughs of mordern physics is the establishment of the fact that light could both behave as a light and a particle. The ressearch into the particle nature of light gave rise to the phenomenon of the photoelectric effect.
Now, a very popular application of this is in the solar panel where light impinges on a metal panel which is connected to a battery that can be used to store charges.
Learn more about photoelectric effect:brainly.com/question/9260704
From the planks equation
E=hv
V= c/ wave length
V= 3×10^8/30×10^-9
=1×10^16
E= hv
6.63×10^-34×1×10^16
= 6.63×10^-18