A, chemical bondings would yield a positive enthalpy change, thus endothermic.
Because the hamburger is still hot from the grill, the cheese melts because of that heat.
The cat fell 1.0 m from the ground.
Using the formula

Here,
Solving for t, the time it spent in the air is

The cat does not accelerate along the horizontal, so it has constant horizontal velocity. Since it strikes the floor 2.2 m from the table, then
