COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Question
Chapter 25, Problem 89QAP
To determine
(a)
What is the particle density (in molecules per cubic meter) of the gas in the cylinder as measured by an astronaut in the rocket ship's lab if a spaceship is traveling at 0.50c relative to Earth, inside the ship, a cylindrical piston that is 50.0 cm long and 4.50 cm in diameter contains 1.25 mol of ideal gas at 25.0°C under 2.20 atm of pressure, the cylinder is oriented with its axis parallel to the direction in which the spaceship is flying?
To determine
(b)
What is the particle density (in molecules per cubic meter) of the gas in the cylinder as measured by a scientist in an Earth lab?
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In this problem you will consider the balance of thermal energy
radiated and absorbed by a person.
Assume that the person is wearing only a skimpy bathing suit of
negligible area. As a rough approximation, the area of a human
body may be considered to be that of the sides of a cylinder of
length L = 2.0 m and circumference C = 0.8 m.
For the Stefan-Boltzmann constant use
o= 5.67 x 10-8 W/m²/K4
Part C
Now calculate Por, the thermal power absorbed by the person from the thermal radiation field in the room, which is assumed to be at Troom = 20°C. If
you do not understand the role played by the emissivities of room and person, be sure to open the hint on that topic.
Express the thermal power numerically, giving your answer to the nearest 10 W.
View Available Hint(s)
Por=
Submit
Part D
[-] ΑΣΦ.
Pnet =
17] ΑΣΦ
Find Paet, the net power radiated by the person when in a room with temperature Troom= 20°C.
Express the net radiated power numerically, to the nearest 10 W.
▸ View Available Hint(s)…
RTI
The molecules in a six-particle gas have velocities
₁ (201-30j) m/s
V2 (10i+60j) m/s
73=(-501 +20j) m/s
7= 30i m/s
Vs (40i-40j) m/s
₁=(-50 i 10j) m/s
Calculate Varg
Express the x and y components of the velocity in meters per second separated by a comma.
Uz avg, Uy avg
Submit
Part B
VD|| ΑΣΦ
Request Answer
W
Calculate Davg-
Express your answer with the appropriate units.
?
m/s
The molecules in a six-particle gas have velocities
v₁ = (20î - 30) m/s
v₂ = (40î +90) m/s
V3 = (-802 +205) m/s
V4 = 30î m/s
V5 (402-405) m/s
=
v₁ = (-50-403) m/s
Part A
Calculate Vavg-
Express the x and y components of the velocity in meters per second separated by a comma.
Uz avg, Uy avg 0,0 m/s
Submit
✓ Correct
Part B
Previous Answers
Calculate Vavg-
Express your answer with the appropriate units.
Vavg0
Submit
μA 6
m
S
2
Previous Answers Request Answer
?
X Incorrect; Try Again; 5 attempts remaining
Chapter 25 Solutions
COLLEGE PHYSICS
Ch. 25 - Prob. 1QAPCh. 25 - Prob. 2QAPCh. 25 - Prob. 3QAPCh. 25 - Prob. 4QAPCh. 25 - Prob. 5QAPCh. 25 - Prob. 6QAPCh. 25 - Prob. 7QAPCh. 25 - Prob. 8QAPCh. 25 - Prob. 9QAPCh. 25 - Prob. 10QAP
Ch. 25 - Prob. 11QAPCh. 25 - Prob. 12QAPCh. 25 - Prob. 13QAPCh. 25 - Prob. 14QAPCh. 25 - Prob. 15QAPCh. 25 - Prob. 16QAPCh. 25 - Prob. 17QAPCh. 25 - Prob. 18QAPCh. 25 - Prob. 19QAPCh. 25 - Prob. 20QAPCh. 25 - Prob. 21QAPCh. 25 - Prob. 22QAPCh. 25 - Prob. 23QAPCh. 25 - Prob. 24QAPCh. 25 - Prob. 25QAPCh. 25 - Prob. 26QAPCh. 25 - Prob. 27QAPCh. 25 - Prob. 28QAPCh. 25 - Prob. 29QAPCh. 25 - Prob. 30QAPCh. 25 - Prob. 31QAPCh. 25 - Prob. 32QAPCh. 25 - Prob. 33QAPCh. 25 - Prob. 34QAPCh. 25 - Prob. 35QAPCh. 25 - Prob. 36QAPCh. 25 - Prob. 37QAPCh. 25 - Prob. 38QAPCh. 25 - Prob. 39QAPCh. 25 - Prob. 40QAPCh. 25 - Prob. 41QAPCh. 25 - Prob. 42QAPCh. 25 - Prob. 43QAPCh. 25 - Prob. 44QAPCh. 25 - Prob. 45QAPCh. 25 - Prob. 46QAPCh. 25 - Prob. 47QAPCh. 25 - Prob. 48QAPCh. 25 - Prob. 49QAPCh. 25 - Prob. 50QAPCh. 25 - Prob. 51QAPCh. 25 - Prob. 52QAPCh. 25 - Prob. 53QAPCh. 25 - Prob. 54QAPCh. 25 - Prob. 55QAPCh. 25 - Prob. 56QAPCh. 25 - Prob. 57QAPCh. 25 - Prob. 58QAPCh. 25 - Prob. 59QAPCh. 25 - Prob. 60QAPCh. 25 - Prob. 61QAPCh. 25 - Prob. 62QAPCh. 25 - Prob. 63QAPCh. 25 - Prob. 64QAPCh. 25 - Prob. 65QAPCh. 25 - Prob. 66QAPCh. 25 - Prob. 67QAPCh. 25 - Prob. 68QAPCh. 25 - Prob. 69QAPCh. 25 - Prob. 70QAPCh. 25 - Prob. 71QAPCh. 25 - Prob. 72QAPCh. 25 - Prob. 73QAPCh. 25 - Prob. 74QAPCh. 25 - Prob. 75QAPCh. 25 - Prob. 76QAPCh. 25 - Prob. 77QAPCh. 25 - Prob. 78QAPCh. 25 - Prob. 79QAPCh. 25 - Prob. 80QAPCh. 25 - Prob. 81QAPCh. 25 - Prob. 82QAPCh. 25 - Prob. 83QAPCh. 25 - Prob. 84QAPCh. 25 - Prob. 85QAPCh. 25 - Prob. 86QAPCh. 25 - Prob. 87QAPCh. 25 - Prob. 88QAPCh. 25 - Prob. 89QAPCh. 25 - Prob. 90QAP
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