T01_questions - 4. Consider a cylinder of radius r and...

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Physics 152S Winter 2012 Tutorial 1 Questions 1. We are trying to lift a load of mass M using helium filled balloon. If the radius of the He balloon is 10 m, what is the maximum load M this balloon can lift? The density of air is 1.25 kg/m 3 and the density of helium is 0.16 kg/m 3 . Ignore the volume of the load, which is much smaller than the volume of the balloon. 2. A 5.0 kg rock whose density is 4800 kg/m 3 is suspended by a string such that half of the rock’s volume is under water. What is the tension in the string? 3. Imagine that you are in a boat, floating on a small pond. In the bottom of the boat is a rock. You pick up the rock, and throw it overboard, into the water. Does the water level in the pond rise, fall, or stay the same?
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Unformatted text preview: 4. Consider a cylinder of radius r and length L ≫ r , and with uniform density less than water. You place the cylinder in water. It floats, with part of it’s volume out of the water. Depending on the density of the cylinder, it will float either with it’s long axis vertical, or horizontal. Find the condition the density must satisfy in the two situations. 5. (Knight, Question 24, page 471). A 1.0-cm-diameter pipe widens to 2.0 cm, then narrows to 5.0 mm. Liquid flows through the first segment at a speed of 4.0 m/s. (a) What is the speed in the second and third segments? (b) What is the volume flow rate through the pipe?...
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This note was uploaded on 04/09/2012 for the course PHYSICS 152 taught by Professor Kim during the Spring '12 term at University of Toronto.

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