Chapter 18: Q. 5 (page 511)
How many moles are in a 2.0 cm * 2.0 cm * 2.0 cm cube of
copper?
The solution gives the description of moles of copper.
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A diving bell is a -tall cylinder closed at the upper end but open at the lower end. The temperature of the air in the bell is . The bell is lowered into the ocean until its lower end is deep. The temperature at that depth is .
a. How high does the water rise in the bell after enough time has passed for the air inside to reach thermal equilibrium?
b. A compressed-air hose from the surface is used to expel all the water from the bell. What minimum air pressure is needed to do this?
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?
Rank in order, from highest to lowest, the temperatures
T1 = 0 K, T2 = 0 C, and T3 = 0 F.
The U-shaped tube in FIGURE P18.57 has a total length of . It is open at one end, closed at the other, and is initially filled with air at pressure.
Mercury is poured slowly into the open end without letting any air escape, thus compressing the air. This is continued until the open side of the tube is completely filled with mercury. What is the length of the column of mercury?
A cylinder contains nitrogen gas.A piston compresses the gas
to half its initial volume.
a. Has the mass density of the gas changed? If so, by what factor?
If not, why not?
b. Has the number of moles of gas changed? If so, by what factor?
If not, why not?
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