Diagram above shows a manometer used to measure the gas pressure in a container. The different between two levels of the mercury in the thermometer is 5 cm.
Rajah di atas menunjukkan manometer digunakan untuk mengukur tekanan gas dalam satu bekas, perbezaan antara dua paras merkuri dalam manometer ialah 5 cm.
What is the pressure of the gas?(Atmospheric pressure = 75 cm Hg)
Berapakah tekanan gas itu?(Tekanan atmosfera = 75 cm Hg)
A 5 cm Hg
B 70 cm Hg
C 75 cm Hg
D 80 cm Hg
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Answer
B
75 cm Hg - 5 cm Hg
70 cm Hg