Water in a car radiator sometimes boils explosively when the radiator cap is removed, which is due to sudden
A) rapid evaporation.
B) reduced pressure.
C) excess condensation.
D) excess vaporization.
Answer: B
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Do the data taken in the experiment support the idea that the pressure times the volume for an ideal gas is constant when the temperature remains at the same temperature?
Kinetic Energy: A truck has four times the mass of a car and is moving with twice the speed of the car. If Kt and Kc refer to the kinetic energies of truck and car respectively, it is correct to say that
A. Kt = 16Kc.
B. Kt = 4Kc.
C. Kt = 2Kc.
D. Kt = Kc.
E. Kt = 
Kc.
This figure shows an all-sky map of the cosmic microwave background recorded by the Planck telescope. How long did this light travel through space before it reached the telescope?
A) about 14 billion years B) about 380,000 years C) about a million years D) Depending on what portion of the map we're looking at, the light traveled for times between just a few minutes and a few billion years.
A pure capacitor is connected to an AC power supply. In this circuit, the current
A) leads the voltage by 90°. B) lags the voltage by 90°. C) lags the voltage by 180°. D) is in phase with the voltage. E) none of the given answers