Physics Laboratory Manual
Physics Laboratory Manual
4th Edition
ISBN: 9781133950639
Author: David Loyd
Publisher: Cengage Learning
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Chapter 18, Problem 7PLA

A piece of wood that floats on water has a mass of 0.0175 kg. A lead weight is tied to the wood, and the apparent mass with the wood in air and the lead weight submerged in water is 0.0765 kg. The apparent mass with the wood and the lead weight both submerged in water is 0.0452 kg. What is the specific gravity of the wood? Show your work.

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An object floats in water with 3/4 of its volume submerged. What is the ratio of the density of the object to that of water? Show your work. (a) 5/8 (b) 3/4 (c) 4/3 (d) 8/5 (e) None of the above.
Please show all work:  50 meters of a circular observation tube with a flat glass window at the bottom is submerged in water as shown in the image. Assuming P(h)= 9800h N/m2, calculate the total force due to hydrostatic pressure on the exterior of the tube. The radius of the tube is 1 meter.
Seawater has a density of 1024 kg/m3. If a submersible machine which is at a pressure of 8.00 x 104 Pa on the inside needs to be lowered from the sea surface 375 m to the ocean floor, what is the pressure differential that its hull needs to be able to withstand? Show your work.
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