Pick the correct option in the list below:
When a substance performs mechanical work, how does its internal energy change?
Increases.
Decreases.
Remains unchanged.
Can we add heat to a substance without changing its internal energy? Consider the possibility that the substance can also simultaneously emit or receive mechanical work.
Yes, we can.
No, we can't.
Two bodies of the same substance but different masses are at the same temperature. Which substance has higher internal energy?
The body with greater mass.
The body with lower mass.
Both have the same internal energy.
Can a substance at a higher temperature have less internal energy than a substance at a lower temperature?
Yes
No
What kind of energies can we change with work?
Kinetic energy.
Potential energy.
Elastic energy.
Internal energy.
All of the above.
