Question

1. A coconut is falling from a tree. I which position is the gravitational potential energy the greatest?

Answer 1

1. Position 1 - gravitational force is maximum at infinity. So the farther apart the two objects are, the more potential energy the falling item has.

2. A: Wool blankets individually wrapped around each. - a wool blanket is an insulator which means it does not readily allow the transfer of heat. The wool blanket stops air flow around the can and sandwich meaning the atoms and molecules in the air have to transfer by conduction.

3. C: It’s surroundings absorb energy from the water. - heat tends to move from areas with high energy to areas of low energy. The ground and air have lower specific heats than water meaning if the ground gets below 0°C, it will start pulling energy from the water until the water freezes.