By operating a reversible heat engine with an ideal gas as the working substance in a Carnot cycle and measuring the ratio Qc /Qh, we can calculate
A. n, the number of moles of the ideal gas.
B. the ratio Vc /Vh of the volumes of the ideal gas.
C. the ratio Pc /Ph of the pressures of the ideal gas.
D. the ratio PcVc /PhVh of the products of volumes and pressures of the ideal gas.
E. the value of Avogadro's number.
Answer: D
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The planet in our solar system with the highest average surface temperature is
A) Venus B) Mercury C) Earth D) Neptune
Consider the hypothetical discovery from Part A reading: "A star's 5 terrestrial planets orbit in the opposite direction of its 3 jovian planets." This discovery would be inconsistent with the nebular theory because the theory holds that __________.
a. terrestrial planets should orbit in a different plane from the plane of the jovian planets b. all the planets formed in a rotating, disk-shaped nebula c. star systems should have equal numbers of terrestrial and jovian planets
The Earth's gravity exerts no torque on a satellite orbiting the Earth in an elliptical orbit. Compare the motion of the satellite at the point nearest the Earth (perigee) to the motion at the point farthest from the Earth (apogee). At these two points:
a. the tangential velocities are the same. c. the angular momenta are the same. b. the angular velocities are the same. d. the kinetic energies are the same.
A river flows due east at 2.0 m/s. A boat crosses the 300-m-wide river by maintaining a constant velocity of 15 m/s due north relative to the water. If no correction is made for the current, how far downstream does the boat move by the time it reaches the far shore?
a. 80 m b. 30 m c. 25 m d. 40 m e. 50 m