Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 17, Problem 64P
To determine
The mean free path and collision time for helium.
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Chapter 17 Solutions
Physics for Scientists and Engineers
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- Under what circumstances would you expect a gas to behave significantly differently than predicted by the ideal gas law?arrow_forwardThe mean flee path for helium at a certain temperature and pressure is 2.10107 m. The radius of a helium atom can be taken as 1.101011 m. What is the measure of the density of helium under those conditions (a) in molecules per cubic meter and (b) in moles per cubic meter? `arrow_forwardEight bumper cars, each with a mass of 322 kg. are running in a room 21.0 m long and 130 m wide. They have no driver, so they just bounce around on their own. The rms speed of the cars is 2.50 m/s. Repeating the arguments of Pressure, Temperature, and RMS Speed, find the average force per unit length (analogous to Pressure) that the cars exert the walls.arrow_forward
- The atomic and molecular rms speeds of gases, vrms, are usually quite large, even at low temperatures. What is vrms, in meters per second, for helium atoms at 4.95 K (which is close to the point of liquefaction)?arrow_forwardAverage atomic and molecular speed ( v rms) are large, even at low temperatures. What is v rms (in m/s) for helium atoms at 8.00 K, just four degrees above helium's liquefaction temperature?arrow_forwardWhat will be the ratio of kinetic energies and rms speeds of a nitrogen molecule and a helium atom at the same temperature?arrow_forward
- The escape speed from the Earth is 1.12 x 104 m/s so thata gas molecule traveling away from Earth near the outerboundary of the Earth’s atmosphere would, at this speed,be able to escape from the Earth’s gravitational field and belost to the atmosphere. At what temperature is the rmsspeed of (a) oxygen molecules, and (b) helium atomsequal to 1.12 x104 m/s (c) Can you explain why ouratmosphere contains oxygen but not helium?arrow_forwardWhat is the root mean square velocity, vrms, for Helium atom (He) at 22oC? Hint: How many amu does an He atom contain? 1 amu = 1.67 x 10-27 kg Boltzman's Constant, k = 1.38 x 10-23 J/K Give your answer in m/s to 4 significant figures (NO DECIMALS)arrow_forwardCalculate the rms speed of helium atoms near the surface of the Sun at a temperature of about 5600 ??.arrow_forward
- The best laboratory vacuum pump can generate a vacuum of about 1nTorr (10^-9 Torr). At 25°C and assuming that air consists of N_2 molecules with a collision diameter of 395 pm, calculate... (b) the mean free path,arrow_forwardWhat does it mean if the fugacity coefficient is greater than or less than 1? How do I measure the degree of deviation of real gases using the compressibility factor?arrow_forwardWhat is the ratio of the average translational kinetic energy of a nitrogen molecule at a temperature of 300 K to the gravitational potential energy of a nitrogen-molecule-Earth system at the ceiling of a 3-m-tall room with respect to the same system with the molecule at the floor?arrow_forward
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