Question

13. To measure moderately low pressures oil with a density of8.0 x 102 kg/m' is used in place of mercury in a barometer. A change in the oil column of 1.0 mm indicates a change in pressure of about: A) 1.2 x 104 Pa B) 0.078 Pa C) 0.85 Pa D) 7.8 Pa E) 8.3 Pa 14. The principle of fluid pressure which is used in hydraulic brakes or lifts is that: A) pressure is the same at all levels in a fluid B) the pressure at a given depth is proportional to the depth in the fluid C) the pressure at a point in a fluid is due to the weight of the fluid above it D) increases of pressure can only be transmitted through fluids E) increases of pressure are transmitted equally to all parts of a fluid 15. An object hangs from a spring balance. The balance indicates 30 N in air, 16 N when the object is submerged in water.What does the balance indicate when the object is submerged in liquid with a density that is half of water?: A) 20 N B) 23 N C) 27N D) 30 N E) 46 N

Answer 1

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