Please help with this :) In which situations (1-5) the internal energy of the body changes as a result of work (A), and in which - as a result of heat flow (B)? Mark the correct squares.
1. The bullet hit the shield.
2. People sitting by the hot fireplace felt warm.
3. The stone statue, standing in a sunny place, warmed up on one side.
4. The metal ball was thrown into hot water.
5. While braking the car's tires warmed up