Answer:
it's A endothermic its when two objects rub each other to form heat this is also known as friction force
Answer:
Saturation is the maximum amount of water vapor in the air at an existing temperature and pressure. Air is said to be saturated at 100 percent relative humidity when it contains the maximum amount of moisture possible at that specific temperature. Dew point is the temperature when air reaches 100% relative humidity.
Answer:
tetrahedral
Explanation:
it sounds like a tetrahedral shape, which is when there are four bonds and no lone pairs around the central atom in the molecule.
