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用一個打針的針管;把頭部堵住. 大氣壓強的大小與空氣密度的關係:向下壓活塞,此時由於氣體體積减小,內部氣體密度增大,且壓強也增大; 大氣壓強的大小與溫度關係:將活塞移動到針管中間,堵住針頭頭部,並加熱,這時會發現活塞向外移動,說明內部氣體壓強變大,將活塞往外壓.
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