Monthly Archives: February 2012

Ideal Gases 12-27

Posted on February 18, 2012 by bi77

What is the average kinetic energy of a gas molecule at a temperature of 25 ?C ? Express it in joules and in electron volts. What is the corresponding rms velocity if the gas is a) hydrogen, b) oxygen, c) … Continue reading →

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Force and Equilibrium 2-36

Posted on February 11, 2012 by bi77

In a stepladder as shown in Fig. 2.38 AC and CE are 2.4 m long and hinged at C. BD is a tie rod 0.72 m long, halfway up. A man weighing 768 N climbs up 1.8 m along the … Continue reading →

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Graviiation 15-28

Posted on February 4, 2012 by bi77

The sun’s mass is about 320,000 times the earth’s mass. The sun is about 400 times as far from the earth as the moon is. What is the ratio of the magnitude of the pull of the sun onthe moon … Continue reading →

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