The graph below plots the escape velocity of each planet along the vertical axis and its surface temperature along the horizontal. The lines plotted in the figure are the average speeds of gas particles as a function of temperature for various gases. Which of the planets plotted in this diagram has the greatest escape velocity?
E
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A certain ideal gas has a molar specific heat at constant pressure of 7R/2. What is its molar specific heat at constant volume?
A) 5R/2 B) 3R/2 C) 8R D) 9R/2 E) 6R
Light waves travel fastest in
a. water. b. glass. c. a vacuum. d. air. e. none of these; they travel at the same speed in all these media.
Radioactive isotope A has a half-life of one year, while radioactive isotope B has a half-life of one day. If equal numbers of atoms of each are present, which will give the highest reading on a Geiger counter?
1) A 2) B 3) both the same How much of the original sample of radioactive isotope A will be left at the end of the second year? 4) none 5) one-quarter 6) one-half 7) one-eighth
Your car gets 34.7 mi/gal on a vacation trip in the U.S. If you were figuring your mileage in Europe, how many km/L did it get? (3.79 L = 1.00 gal; 1.00 mi = 1.61 km)
A) 14.7 km/L B) 9.16 km/L C) 55.9 km/L D) 32.4 km/L