Physics Laboratory Experiments
8th Edition
ISBN: 9781285738567
Author: Jerry D. Wilson, Cecilia A. Hernández-Hall
Publisher: Cengage Learning
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Chapter 21, Problem 4Q
- (a) Explain how a submarine is caused to submerge and surface without the use of its propulsion propeller and fins.
- (b) Which has the greater density: (1) ice or water, (2) milk or cream?
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Check out a sample textbook solutionChapter 21 Solutions
Physics Laboratory Experiments
Ch. 21 - Prob. 1ASACh. 21 - Show that the buoyant force is given by Fb = fgVf...Ch. 21 - Give the conditions on densities that determine...Ch. 21 - Distinguish between density and specific gravity,...Ch. 21 - Describe how the density of an object less dense...Ch. 21 - Why is it important to make certain that no air...Ch. 21 - In Part B, the string will cause error. When does...Ch. 21 - Discuss the situation that occurs when an object...Ch. 21 - (a) Explain how a submarine is caused to submerge...Ch. 21 - A block of wood floats in a beaker of water....
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- A submarine is stranded on the bottom of the ocean with its hatch 25.0 m below surface. Calculate force needed to open the hatch from the inside, given it is circular and 0.450 m in diameter. Air pressure inside the submarine is 1.00 atm.arrow_forwardBird bones have air pockets to reduce their weight—this also gives them an average density significantly less than that of the bones of other animals. Suppose an ornithologist weighs a bird bone air and in water and finds its mass is 45.0 g ad its apparent mass when submerged is 3.60 g (assume the bone is watertight.)(a) What mass of is displaced? (b) What is the volume of the bone? (c) What is its average density?arrow_forwardIs there a net force on a dam due to atmospheric pressure? Explain your answer.arrow_forward
- Imagine a remote location near the Nott Pole, a chunk of Ice floats a lake. Next to lake, a glacier with the same volume as ice sits on land. If both chunks of ice should melt due to rising global temperatures, and the melted ice all goes into the lake, which one would cause the level of the lake to rise the most? Explain.arrow_forwardWhat fraction of ice is submerged when it floats in freshwater, given the density of water 0°C is very close to 1000 kg/m3?arrow_forwardA 75.0-kg floats in freshwater 3.00% of his volume above water when his are empty, and 5.00% of his volume above water when his lungs are full. Calculate the volume of air inhales—called his lung capacity—in liters. (b) Does lung volume seem reasonable?arrow_forward
- Why is it difficult to swim under water in the Great Salt Lake?arrow_forwardA simple compass cute made by placing a small bar magnet on a cork floating in water. (a) What fraction of a plain cork will be submerged when floating in water? (b) If the cork has a mass of 10.0 g and a 20.0-g magnet is placed on it, what fraction of the cork will be submerged? (c) Will the bar magnet and cork float in ethyl alcohol?arrow_forwardWater towers store water above the level of consumers for times of heavy use, eliminating need for high-speed pumps. How high above a user must the water level be to create a gauge pressure of 3.00105 N/m2?arrow_forward
- Why does atmospheric pressure decrease more rapidly than linearly with altitude?arrow_forwardA man has a mass of 80 kg and a density of 955kg/m3 (excluding the air in his lungs). (a) Calculate his volume. (b) Find the buoyant force air exerts on him. (c) What the ratio of the buoyant force to his weight?arrow_forwardBecause atmospheric pressure is about 105 N/m2 and the area of a persons chest is about 0.13 m2, the force of the atmosphere on ones chest is around 13 000 N. In view of this enormous force, why dont our bodies collapse?arrow_forward
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