Physics for Scientists and Engineers, Vol. 1
6th Edition
ISBN: 9781429201322
Author: Paul A. Tipler, Gene Mosca
Publisher: Macmillan Higher Education
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Chapter 20, Problem 23P
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The temperature inside a supernova explosion is said to be 2.00×1013 K . (a) What would the average velocity vrms of hydrogen atoms be?(b) What is unreasonable about this velocity? (c) Which premise or assumption is responsible?
Chapter 20 Solutions
Physics for Scientists and Engineers, Vol. 1
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- In the hot gases of an automotive engine's cylinders, temperatures may exceed 3100 k. What would be the "root mean square" or "rms" velocity of a hydrogen atom, if one happened to be in that gas after some chemical reaction? The mass of a hydrogen atom is about 1.66x10-27 kg. Give your answer in m/s, but enter only the number.arrow_forwardAn altitude of 150 km is the lowest altitude where a satellite could successfully orbit the earth.At 150 km, the pressure is about 3 x 10-6torr and the temperature is roughly 250 K. Assuming, forsimplicity, that the air consists entirely of oxygen, calculate the mean free path under theseconditions. What is the average collision frequency?arrow_forwardIf all the gas particles are in a state of moving toward each other and causing a collision, then the calculated velocity is... A. The most possible speedB. Average speedC. Mean square root velocityD. Relative speedE. Speed squaredarrow_forward
- What pressure of argon gas is required to produce a collision rate of 4.5 × 1020 s−1 at 425 K on a circular patch of surface of diameter 1.5 mm?arrow_forwardMuch of the gas near the Sun is hydrogen nuclei. Its temperature would have to be 1.5 × 107 K for the rms speed to equal the escape speed from the Sun. a) What is that velocity, in meters per second?arrow_forward) (a) Black holes are objects in Outer Space that have so much mass in such a small volume, nothing canescape from them, not even light. Suppose a black hole is eating a companion star. As the gas from thecompanion star falls into the black hole, just before it passes the point of no return, the black hole’stremendous gravity compresses the gas so that its temperature rises to 10 million K. Because this gas is sodense, it is opaque, so it radiates X-rays into space. At what wavelength does this gas radiate its maximumintensity?(b) How many kiloelectron-volts (or keV) does each X-ray photon in (8)(a) have?(c) An electron microscope uses magnets to accelerate electrons with negligible initial speed through apotential difference of 50 million volts. Calculate the ratio of the resolution of this electron microscope to theresolution of a microscope that uses visible light with a wavelength of 5.00 × 10−7 m through a circularaperture with an aperture of 5.00 mm.(d) A common science-fiction…arrow_forward
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