GENERAL KNOWLEDGE

Detailed explanation-1: -If the temperature of a confined liquid is held constant and its pressure is tripled, the volume will? remain the same. How much work input is required to lower (not drop) a 120-lb weight from the top of a 3-ft table to the floor? 360 foot-pounds.

Detailed explanation-2: -(3) If the pressure of a confined gas is tripled while its temperature remains constant, the volume of the gas will triple. (4) If the pressure of a confined gas is tripled while its temperature remains constant the density of the gas will decrease to one third its original value.

Detailed explanation-3: -Boyle’s law states that the pressure of a gas and the volume it occupies are inversely proportional. Therefore, if the pressure increases by a factor of 3 (tripled), then at constant temperature, we expect the volume to decrease by a factor of 13 ("cut in third").

Detailed explanation-4: -Increasing the Kelvin temperature increases the pressure. The two quantities are directly proportional to one another. A tripling of the Kelvin temperature will triple the pressure of the gas.

Detailed explanation-5: -The answer is B. 3/2 the original pressure. Since the initial pressure is expressed in nRTV n R T V, the new pressure is 3/2 of the original given pressure.