QUESTION 18 OF 18 When you raise the temperature of air, the molecules move fart
ID: 1506167 • Letter: Q
Question
QUESTION 18 OF 18
When you raise the temperature of air, the molecules move farther apart from each other. This lowers the density of the warm air. What will happen to this warm air?
(In an ideal gas, increasing the temperature of the gas also increases its volume.)
A. As the air warms, its density increases. The warm air will then rise up in the atmosphere because the buoyant force becomes greater than the gravitational force. B. As the air warms, its density decreases. The warm air will then fall towards the ground because the buoyant force becomes less than the gravitational force. C. As the air warms, its density decreases. The warm air will then fall towards the ground because the buoyant force becomes greater than the gravitational force. D. As the air warms, its density decreases. The warm air will then rise up in the atmosphere because the buoyant force becomes greater than the gravitational force.
#2)
If you were to put the metal block into the water and measure the displaced water as in experiment 2, could you use the following equation to calculate the metal's density?
A. No, because the only force acting on the block would be the buoyant force. B. No, because the only forces acting on the block would be the buoyant and gravitational forces. C. Yes, because the only forces acting on the block would be the buoyant and gravitational forces. D. No, because there are forces other than just the buoyant and gravitational forces acting on the block.
Explanation / Answer
Answer of question 1:
D. As the air warms, its density decreases. The warm air will then rise up in the atmosphere because the buoyant force becomes greater than the gravitational force.
Answer of question 2:
C. Yes, because the only forces acting on the block would be the buoyant and gravitational forces.