A 10-L flask and a 1-L flask each contain two moles of ideal diatomic gas (but not the same gas) at 25C. Which of the following statements about these gases must be true? (There could be more than one correct choice.)
A) The internal (thermal) energy of the gas in both flasks is the same.
B) The internal (thermal) energy of the gas in the larger flask is greater than the internal (thermal) energy of the gas in the smaller flask.
C) The internal (thermal) energy of the gas in the smaller flask is greater than the internal (thermal) energy of the gas in the larger flask.
D) The molecules in the larger flask have the same root-mean-square speed as those in the smaller flask.
E) The molecules in the smaller flask have the same average kinetic energy per molecule as those in the larger flask.
Question 2
A 1-kg ball is released from a height of 6 m, and a 2-kg ball is released from a height of 3 m. Air resistance is negligible as they fall. Which of the following statements about these balls are correct? (There could be more than one correct choice.
) A) As they reach the ground, the 1-kg ball will have more kinetic energy than the 2-kg ball because it was dropped from a greater height.
B) As they reach the ground, the 1-kg ball will be moving faster than the 2-kg ball.
C) Both balls will reach the ground with the same speed.
D) Both balls will reach the ground with the same kinetic energy.
E) Both balls will take the same time to reach the ground.
The swan neck flask experiment
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