A gas expands as shown in the graph. If the heat taken in during this process is 1.02 × 106 J and 1 atm = 1.01 × 105 N/m2, the change in internal energy of the gas (in J) is how much?
?
?
a.
?2.42 × 106
b.
?1.40 × 106
c.
?1.02 × 106
d.
1.02 × 106
e.
1.40 × 106
b
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An object weighing 4.00 N falls from rest subject to a frictional drag force given by Fdrag = bv2, where v is the speed of the object and What terminal speed will this object approach?
A) 1.78 m/s B) 3.42 m/s C) 1.15 m/s D) 2.25 m/s E) 0.75 m/s
The rotation curve of a galaxy is displayed as a plot of
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How many moles of air must escape from a 10 m × 8.0 m × 5.0 m room when the temperature is raised from 0°C to 10°C? Assume the pressure remains unchanged at one atmosphere while the room is heated
a. 1.3 × 10^3 moles c. 6.5 × 10^2 moles b. 1.2 × 10^3 moles d. 3.7 × 10^2 moles
What aspect of Kepler's theory would have horrified all astronomers before Kepler?
A) Kepler's elliptical orbits. B) The fact that the Earth has a spherical shape in Kepler's theory. C) Kepler's simple circular orbits. D) The fact that Earth was no longer at the center. E) The absence of any epicycles [or "circles-within-circles"].