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Physics — Second Secondary

Physics — Second Secondary

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Physics — Second Secondary 2026/2027

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Quiz

Chapter 6: Gas Laws — Picture questions (exam style)

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1.
A mercury manometer is connected to a gas tank; atmospheric pressure 74 cmHg; level difference 20 cm (open limb higher). Which option is correct? (ρHg = 13600, g = 9.8)
A mercury manometer is connected to a gas tank; atmospheric pressure 74 cmHg; level difference 20 cm (open limb higher). Which option is correct? (ρHg = 13600, g = 9.8)
gas pressure = 114 cmHg, gas pressure ≈ 2.666e+04 Pa
gas pressure = 94 cmHg, gas pressure ≈ 1.378e+05 Pa
gas pressure = 94 cmHg, gas pressure ≈ 1.253e+05 Pa
gas pressure = 94 cmHg, gas pressure ≈ 2.666e+04 Pa
2.
A mercury manometer is connected to a gas tank; atmospheric pressure 75 cmHg; level difference 20 cm (open limb lower). Which option is correct? (ρHg = 13600, g = 9.8)
A mercury manometer is connected to a gas tank; atmospheric pressure 75 cmHg; level difference 20 cm (open limb lower). Which option is correct? (ρHg = 13600, g = 9.8)
gas pressure = 35 cmHg, gas pressure ≈ 8.063e+04 Pa
gas pressure = 55 cmHg, gas pressure ≈ 7.33e+04 Pa
gas pressure = -20 cmHg, gas pressure ≈ 7.33e+04 Pa
gas pressure = 35 cmHg, gas pressure ≈ 7.33e+04 Pa
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