1. Which of the following is necessarily true regarding the buoyant force exerted by air when an object is suspended in air? A. Air does not exert a buoyant force. B. The buoyant force exerted by air is negligible compared to the weight of the object. C. The buoyant force exerted by air is much greater than the weight of the object. D. The buoyant force exerted by air is equal to the weight of the surrounding air. 2. Which of the following is the capacity of the pycnometer used in the experiment? A. 25x10 m B. 0.025 mL C. 0.25 cm D. 25 L
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
1. Which of the following is necessarily true regarding the buoyant force exerted by air when an object is suspended in air?
A. Air does not exert a buoyant force.
B. The buoyant force exerted by air is negligible compared to the weight of the object.
C. The buoyant force exerted by air is much greater than the weight of the object.
D. The buoyant force exerted by air is equal to the weight of the surrounding air.
2. Which of the following is the capacity of the pycnometer used in the experiment?
A. 25x10 m
B. 0.025 mL
C. 0.25 cm
D. 25 L
3. In the activity for Hooke's Law and Properties of Materials, which of the following liquid exert
the smallest buoyant force when the cubes are suspended and immersed in each liquid?
A. brine
B. alcohol
C. water
D. air
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