2.1. Kinetic particle model of matter
A subsection of Physics, 0625, through 2. Thermal physics
Listing 10 of 321 questions
shows a balloon inflated with air. The pressure of the air at the inner surface of the balloon keeps the rubber stretched. Explain, in terms of the momentum of the molecules, why there is a pressure at the inner surface of the balloon. The volume of the air in the balloon is 630 cm3 and the pressure of the air in the balloon is 1.0 × 105 Pa. The balloon is tied to a heavy stone and dropped into a lake. The balloon is pulled down quickly and the temperature of the air inside does not change. Calculate the volume of the air when the pressure of the air is 1.4 × 105 Pa. volume = The balloon and stone stop moving when the stone hits the bottom of the lake. The temperature of the air now begins to decrease. Explain why the volume of the air in the balloon decreases as the temperature decreases.
0625_w21_qp_41
THEORY
2021
Paper 4, Variant 1
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In an experiment to investigate the relationship between the volume of a sample of air and its pressure, the volume of the sample is decreased and its pressure is measured continuously. Curve X on the graph shows the results that would be expected for a fixed mass of air at constant temperature. Curve Y shows the results that are obtained in this particular experiment. volume pressure X Y Which row shows two possible reasons why curve Y is different from curve X?
0625_w23_qp_23
MCQ
2023
Paper 2, Variant 3
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Questions Discovered
321