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Q6: An empty jar is pushed open-side downward
Q12: In cold weather, your hands will be
Q15: Your pet hamster sits on a record
Q31: Two 5000-kg rail cars roll without friction
Q40: A 500-N parachutist opens his chute and
Q43: A substance that heats up relatively quickly
Q47: As two objects moving toward each other
Q48: When an ice cube in a glass
Q51: The pascal is a pressure unit equal
Q66: A liter of hot water will cool