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1.密度,質量,體積——ρ=m/V 同種物質密度一定,質量與體積成正比 不同物質質量一定,密度與體積成反比 不同物質體積一定,密度與質量成正比 2.壓強,壓力,接觸面積——p=F/S 壓強一定,壓力與接觸面積成正比 壓力一定,壓強與接觸面積成反比 面積一定,壓強與壓力成正比
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