A taxicab moves five blocks due north, five blocks due east, and another three blocks due north. Assume all blocks are of equal size. How far is the taxi from its starting point?
a. 13 blocks
c. 9.2 blocks
b. 9.4 blocks
d. 8.6 blocks
B
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A fixed amount of ideal gas is held in a rigid container that expands negligibly when heated. At 20°C the gas pressure is p. If we add enough heat to increase the temperature from 20°C to 40°C, the pressure will be
A) impossible to determine since we do not know the number of moles of gas in the container. B) greater than 2p. C) less than 2p. D) equal to 2p. E) impossible to determine since we do not know the volume of gas in the container.
One of the most efficient engines built so far has the following characteristics: combustion chamber temperature = 1900°C; exhaust temperature = 430°C. 7.0 × 109 cal of fuel produces 1.4 × 1010 J of work in one hour
What is the power output, in hp, of this engine?
The power consumed by the light bulb in watts is
a. 0.05 c. 720 b. 20 d. none of the above
Saturn's rings are widest open, doubling the planet's brightness, when it is at:
A) opposition. B) quadrature. C) greatest elongation. D) equinox. E) solstice.