Increasing the water temperature by adding hot water is called thermal heating, so the correct answer is d)
Fossils are usually formed under heat and pressure deep in the earth. Relative dating is using the rock layer it was found in, and absolute dating is using radioactive decay to find the exact date a fossil was formed.
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.