When a system does work, what happens to its internal energy

Internal energy decreases

Explanation:

According to first law of thermodynamics heat can neither be created nor destroyed , but it changes from one form to another form.

Mathematical representation :

U=Q-w

Where U=Internal energy of system

w=Work done

Q=Heat gain or removed

When system does work then it take positive .When system does work then Q is positive .

Hence, the internal energy will decrease .

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

choosing tennis and golf balls is your inde choice.

their mass and volume are dep