Answer:
The pressure in the water is 
Explanation:
Given that,
Depth = 101 m
Let P be the pressure at the bottom of water at a depth
We need to calculate the pressure in water
Using formula of pressure

Where,
= atmospheric pressure
= pressure in water
Put the value of
in to the formula

Put the value into the formula


Hence, The pressure in the water is 
Answer: The correct option is "They must be cooler than the air inside the house".
Explanation:
Thermal energy flows from the body at higher temperature to the body at the lower temperature.
In the given problem, the metal aluminum coils in an air conditioner conducts thermal energy from inside the house. The coils must be cooler than the air inside the house.
The thermal energy flows from inside the room to the coils in an air condition. Then, the thermal energy flows from the metal aluminium coils to outside the house.
I would say that work is being done in all the situations because technically in physics work is done whenever force is applied through a distance.