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Chapter 18: Q. 44 (page 512)
A 15C, 2.0-cm-diameter aluminum bar just barely slips between two rigid steel walls 10.0 cm apart. If the bar is warmed to 25C, how much force does it exert on each wall?
The accurate answer is
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A brass ring with inner diameter 2.00 cm and outer diameter 3.00 cm needs to fit over a 2.00-cm-diameter steel rod, but at 20C the hole through the brass ring is 50 mm too small in diameter. To what temperature, inC, must the rod and ring be heated so that the ring just barely slips over the rod?
A -diameter cylinder that is long contains of oxygen gas at
a. How many moles of oxygen are in the cylinder?
b. How many oxygen molecules are in the cylinder?
c. What is the number density of the oxygen?
d. What is the reading of a pressure gauge attached to the tank
The cylinder in FIGURE Q18.4 is divided into two compartments by a frictionless piston that can slide back and forth. If the piston is in equilibrium, is the pressure on the left side greater than, less than, or equal to the pressure on the right? Explain.
FIGURE Q18.4
An aquanaut lives in an underwater apartment 100 m beneath the surface of the ocean. Compare the freezing and boiling points of water in the aquanaut鈥檚 apartment to their values at the surface. Are they higher, lower, or the same? Explain.
The lowest and highest natural temperatures ever recorded on earth are -129掳F in Antarctica and 134掳F in Death Valley. What are these temperatures in 掳C and in K?
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