Sure !
The work is (weight of the book) x (height of the desk above the floor).
The force (weight) is the result of gravity.
It was gravity that did the work.
Option (A) is correct. Fission and fusion reactions both involve making changes to an atom's nuclei.
Nuclear fission is a process in which a bigger nucleus breaks into two or more smaller nuclei with the liberation of large amount of energy.
Nuclear fusion is a process in which two smaller nuclei fuse together to form a bigger nucleus. A tremendous amount of energy is released during fusion.
Thus both fission and fusion involve the changes in the nuclei of atoms. Rest of the atom like the electronic configuration etc remains same.
Answer:
option D
Explanation:
Power = work divided by time
and Work is equal to force multiplied by displacement
therefore power =
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Answer:
300000.01008 Pa
123.76237 m/s²
Explanation:
= Density of liquid nitrogen = 808 kg/m³
h = Depth
g = Acceleration due to gravity
P = Atmospheric pressure
Absolute Pressure is given by
Below 2 m from surface

Below 5 m from surface

Subtracting the above equations we get

The acceleration due to gravity on the planet is 123.76237 m/s²
Equating the value of g in the first equation

The atmospheric pressure on the planet is 300000.01008 Pa