College Physics
4th Edition
ISBN: 9780134610467
Author: Knight, Randall Dewey, Jones, Brian, Field, Stuart
Publisher: Pearson,
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Chapter 13, Problem 56GP
To determine
The diameter of bubble when it reaches the surface of the lake.
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To explore the bottom of a 10-m-deep lake, your friend Tom proposes to get a long garden hose, put one end on land and the other in his mouth for breathing underwater, and descend into the depths. Susan, who overhears the conversation, reacts with horror and warns Tom that he will not be able to inhale when he is at the lake bottom. Why is Susan so worried?
Michelle, a nutritionist waters her plants in her garden. Water flows at 2.5 m/s through a garden hose whose inside radius is 6.0 mm. If the nozzle has aradius 3.0 mm, what is the speed of the water coming out in the nozzle?
A scuba diver at a depth of 60m notices the bubbles he exhales have diameters of 1cm. Assume the surface tension and water temperature remains relatively constant. What diameter bubble should be expect at a depth of 15m?
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B. 1.452 cm
C. 2.301 cm
D. 1.203 cm
Chapter 13 Solutions
College Physics
Ch. 13 - Which has the greater density, 1 g of mercury or...Ch. 13 - Prob. 2CQCh. 13 - Prob. 3CQCh. 13 - Prob. 4CQCh. 13 - Prob. 5CQCh. 13 - Prob. 6CQCh. 13 - Prob. 7CQCh. 13 - Prob. 8CQCh. 13 - Prob. 9CQCh. 13 - A steel cylinder at sea level contains air at a...
Ch. 13 - Prob. 11CQCh. 13 - Imagine a square column of the atmosphere, 1 m on...Ch. 13 - Prob. 13CQCh. 13 - Prob. 14CQCh. 13 - A beaker of water rests on a scale. A metal ball...Ch. 13 - Prob. 16CQCh. 13 - Prob. 17CQCh. 13 - Prob. 18CQCh. 13 - A heavy lead block and a light aluminum block of...Ch. 13 - When you place an egg in water, it sinks. If you...Ch. 13 - The water of the Dead Sea is extremely salty,...Ch. 13 - Fish can adjust their buoyancy with an organ...Ch. 13 - Prob. 23CQCh. 13 - Prob. 24CQCh. 13 - Prob. 25CQCh. 13 - Prob. 27CQCh. 13 - Prob. 28CQCh. 13 - Is it possible for a fluid in a tube to flow in...Ch. 13 - Prob. 31CQCh. 13 - Prob. 32MCQCh. 13 - Figure Q.13.33 shows a 100 g block of copper ( =...Ch. 13 - Masses A and B rest on very light pistons that...Ch. 13 - Prob. 35MCQCh. 13 - Prob. 36MCQCh. 13 - A large beaker of water is filled to its rim with...Ch. 13 - Prob. 38MCQCh. 13 - Prob. 40MCQCh. 13 - An object floats in water, with 75% of its volume...Ch. 13 - Prob. 42MCQCh. 13 - Water flows through a 4.0-cm-diameter horizontal...Ch. 13 - A 15-m-long garden hose has an inner diameter of...Ch. 13 - Prob. 1PCh. 13 - Prob. 2PCh. 13 - A standard gold bar stored at Fort Knox, Kentucky,...Ch. 13 - Prob. 4PCh. 13 - Prob. 5PCh. 13 - Prob. 6PCh. 13 - Prob. 7PCh. 13 - Prob. 8PCh. 13 - A tall cylinder contains 25 cm of water. Oil is...Ch. 13 - A 35-cm-tall, 5.0-cm-diameter cylindrical beaker...Ch. 13 - The gauge pressure at the bottom of a cylinder of...Ch. 13 - Prob. 12PCh. 13 - A research submarine has a 20-cm-diameter window...Ch. 13 - The highest that George can suck water up a very...Ch. 13 - Prob. 15PCh. 13 - Prob. 16PCh. 13 - Prob. 17PCh. 13 - Glycerin is poured into an open U-shaped tube...Ch. 13 - A U-shaped tube, open to the air on both ends,...Ch. 13 - What is the height of a water barometer at...Ch. 13 - A cargo barge is loaded in a saltwater harbor for...Ch. 13 - Prob. 22PCh. 13 - A 10 cm 10 cm 10 cm wood block with a density of...Ch. 13 - What is the tension in the string in Figure...Ch. 13 - What is the tension in the string in Figure...Ch. 13 - To determine an athletes body fat, she is weighed...Ch. 13 - Prob. 28PCh. 13 - Styrofoam has a density of 32 kg/m3. What is the...Ch. 13 - Prob. 30PCh. 13 - Calculate the buoyant force due to the surrounding...Ch. 13 - Prob. 32PCh. 13 - Water flowing through a 2.0-cm-diameter pipe can...Ch. 13 - Prob. 34PCh. 13 - Prob. 35PCh. 13 - Prob. 37PCh. 13 - Prob. 39PCh. 13 - Prob. 40PCh. 13 - What pressure difference is required between the...Ch. 13 - Prob. 42PCh. 13 - Water flows at 0.25 L/s through a 10-m-long garden...Ch. 13 - Prob. 44PCh. 13 - Prob. 45PCh. 13 - Prob. 47PCh. 13 - Prob. 48PCh. 13 - Prob. 49PCh. 13 - Prob. 50PCh. 13 - As discussed in Section 13.3, a persons percentage...Ch. 13 - The density of aluminum is 2700 kg/m3. How many...Ch. 13 - An oil layer floats on 85 cm of water in a tank....Ch. 13 - Prob. 55GPCh. 13 - Prob. 56GPCh. 13 - A sphere completely submerged in water is tethered...Ch. 13 - Prob. 58GPCh. 13 - A 5.0 kg rock whose density is 4800 kg/m3 is...Ch. 13 - A flat slab of styrofoam, with a density of 32...Ch. 13 - A 2.0 mL syringe has an inner diameter of 6.0 mm,...Ch. 13 - Prob. 62GPCh. 13 - The leaves of a tree lose water to the atmosphere...Ch. 13 - II A hurricane wind blows across a 6.00 m 5.0 m...Ch. 13 - Prob. 65GPCh. 13 - Prob. 66GPCh. 13 - Prob. 67GPCh. 13 - Prob. 68GPCh. 13 - Prob. 69GPCh. 13 - Smoking tobacco is bad for your circulatory...Ch. 13 - A stiff, 10-cm-long tube with an inner diameter of...Ch. 13 - Suppose that in response to some stimulus a small...Ch. 13 - Prob. 73MSPPCh. 13 - Prob. 75MSPP
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- In about 1657. Otto von Guericke, inventor of the air pump, evacuated a sphere made of two brass hemispheres (Fig. P9.89). Two teams of eight horses each could pull the hemispheres apart only on some trials and then with greatest difficulty, with the resulting sound likened to a cannon firing. Find the force F required to pull the thin-walled evacuated hemispheres apart in terms of R, the radius of the hemispheres, P the pressure inside the hemispheres, and atmospheric pressure P0. Figure P9.89arrow_forwardIn about 1657, Otto von Guericke, inventor of the air pump, evacuated a sphere made of two brass hemispheres (Fig. P15.62). Two teams of eight horses each could pull the hemispheres apart only on some trials and then with greatest difficulty, with the resulting sound likened to a cannon firing. Find the force F required to pull the thin-walled evacuated hemispheres apart in terms of R, the radius of the hemispheres; P, the pressure inside the hemispheres; and atmospheric pressure P0. Figure P15.62arrow_forwardWater enters a smooth, horizontal tube with a speed of 2.0 m/s and emerges out of the tube with a speed of 8.0 m/s. Each end of the tube has a different cross-sectional radius. Find the ratio of the entrance radius to the exit radius.arrow_forward
- Bird 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_forward(a) A 75.0-kg man floats in freshwater with 3.00% of his volume above water when his lungs are empty, and 5.00% of his volume above water when his lungs are full. Calculate the volume of air he inhales—called his lung capacity—in liters. (b) Does this lung volume seem reasonable?arrow_forwardOxygen reaches the veinless cornea of the eye by diffusing through its tear layer, which is 0.500-mm thick. How long does it take the average oxygen molecule to do this?arrow_forward
- What is the ratio of the average distances that oxygen will diffuse in a given time in air and water? Why is this distance less in water (equivalently, why is D less in water)?arrow_forwardHow do gases differ from liquids?arrow_forwardWhen a person inhales, air moves down the bronchus (windpipe) at 15 cm/s. The average How speed of the air doubles through a constriction in the bronchus. Assuming incompressible flow, determine the pressure drop in the constriction.arrow_forward
- Look back to figure 14.29. Answer the following two question. Why is poless than atmospheric? Why is pogreater than pi?arrow_forwardScurrilous con artists have been known to represent gold-plated tungsten ingots as pure gold and sell them to the greedy at prices much below gold value but deservedly far above the cost of tungsten. With what accuracy must you be able to measure the mass of such an ingot in and out of water to tell that it is almost pure tungsten rather than pure gold?arrow_forwardA diver 50 m deep in 10∘C fresh water exhales a 1.5 cm diameter bubble. What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20 ∘C ? Assume that the air bubble is always in thermal equilibrium with the surrounding water.arrow_forward
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