Physics Laboratory Manual
Physics Laboratory Manual
4th Edition
ISBN: 9781133950639
Author: David Loyd
Publisher: Cengage Learning
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Chapter 25, Problem 3PLA
To determine

The SI units for pressure and volume. And the value of Boltzmann’s constant.

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(P.Ç.1.3) The figure below shows three different Maxwell Boltzmann distribution curves. Which of the following statements can be said according to these curves? speed v I. For the same gas at three different temperatures, T3 >T2> T1 II. For three different gases at same temperature, the relationship between the molecular masses of these gases is as M3 >M2 > M,1 III. For three different gases at same temperature, the relationship between the molecular masses of these gases is as M, >M2 > M3 IV. For the same gas at three different temperatures, T1 >T2> T3 V. For three different gases at same temperature, the relationship between the average kinetic energies of molecules of these gasses is E3 >E2 > E, # of molecules
Consider the Universe to be spherical, mostly hydrogen gas molecules undergoing adiabatic expansion over its lifetime. a. Using the ideal gas law and properties of adiabatic processes show T V γ − 1= C where C is a constant.  b. The current Universe extends at least 15 billion light-years in all directions (r = 1.4 x 1026m), and the current temperature of the Universe is 2.7 K. Estimate the temperature of the Universe when it was the size of a nutshell, with a radius of 2 cm. c. If the density of the gas in the Universe, N/V, is one hydrogen atom per cubic meter, calculate the current pressure of the Universe.  d. Estimate the pressure of the Universe when it was the size of a nutshell. (You may get a calculator overflow error)
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