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Chapter 18: Q. 7 (page 511)
What is the number density of (a) aluminium and (b) lead?
It deals with the density of lead and aluminium and the atoms bounded in the system
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The circular piston shown in FIGURE P18.58 floats on of compressed air.
a. What is the piston height if the temperature is ?
b. How far does the piston move if the temperature is increased by ?
A nebula—a region of the galaxy where new stars are forming—contains a very tenuous gas with . This gas is heated to by ultraviolet radiation from nearby stars. What is the gas pressure in atm?
The solar corona is a very hot atmosphere surrounding the visible surface of the sun. X-ray emissions from the corona show that its temperature is about . The gas pressure in the corona is about . Estimate the number density of particles in the solar corona.
A gas at fills volume . If the pressure is held constant, what is the volume if
(a) the Celsius temperature is doubled and
(b) the Kelvin temperature is doubled?
a. A sample of water vapour in an enclosed cylinder has an initial pressure of 500 Pa at an initial temperature of -0.01°C. A piston squeezes the sample smaller and smaller, without limit. Describe what happens to the water as the squeezing progresses.
b. Repeat part a if the initial temperature is 0.03°C warmer.
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