Which of the following body temperatures do not change in the events described?
Pastry; after you put it in a hot oven and wait for it to bake.
Ball; when you give it to a friend.
Automotive engine; when you start it.
Air in a hot air balloon; as the balloon begins to rise from the ground.
The eraser; when you rub it against the table.
Cold water; after drinking it.
Juice; when you pour it from a bottle into a glass.
