Answer: The pressure of a gas will increase when there is a decrease in the volume of the gas.
Explanation: according to Boyle's law, the volume of a gas will decrease when the pressure is increased at constant temperature and vice versa.
The density of the stone is 5 because the formula is mass/volume and the volume is 5 and the mass is 25
The answer is 25 grams for this question
The valves stop the blood from flowing backwards
