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Chapter 14: Q. 33 (page 385)
An 80-cm-long, 1.0-mm-diameter steel guitar string must be tightened to a tension of 2000 N by turning the tuning screws. By how much is the string stretched?
The string is stretched by.
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A 50-cm-thick layer of oil floats on a 120-cm-thick layer of water. What is the pressure at the bottom of the water layer?
A research submarine has a 20-cm-diameter window 8.0 cm thick. The manufacturer says the window can withstand forces up to 1.0 * 106 N. What is the submarine’s maximum
safe depth? The pressure inside the submarine is maintained at 1.0 atm.
A 20-cm-diameter circular cover is placed over a 10-cm-diameter hole that leads into an evacuated chamber. The pressure in the chamber is 20 kPa. How much force is required to pull the cover off?
Gas flows through the pipe of FIGURE Q14.10. You can’t see into the pipe to know how the inner diameter changes. Rank in order, from largest to smallest, the gas speeds va , vb , and vc at points a, b, and c. Explain.
What is the volume in mL of 55 g of a liquid with density 1100 kg/m3?
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