Mercury's evolution was different from the Moon's because:
A) Mercury developed a dense atmosphere while the Moon never did.
B) Mercury was located farther from Earth, so experienced no tidal forces.
C) Mercury was subject to more intense asteroid bombardment than the Moon.
D) dense Mercury had an iron core that shrank, creating the lobate scarps.
E) Mercury developed a strong magnetic field to protect it from solar radiation.
D
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A block and a beaker of water are placed side-by-side on a scale (case A). The block is then placed into the beaker of water, where it floats (case B). How do the two scale readings compare?
1.Scale A reads more than scale B. 2.Scale A reads the same as scale B. 3.Scale A reads less than scale B. 4.Not enough information.
Special relativity predicts that moving clocks run slow
a. True b. False Indicate whether the statement is true or false
A solar heated house loses about 7.4 × 10^7 cal through its outer surfaces on a typical 24-hour winter day. What mass of storage rock is needed to provide this amount of heat if it is brought up to initial temperature of 62°C by the solar collectors, and the house is maintained at 20°C? (Specific heat of rock is 0.21 cal/g • °C.)
a. 160 kg c. 6100 kg b. 1200 kg d. 8400 kg
An electron has a velocity of 6.0 × 10^6 m/s in the positive x direction at a point where the magnetic field has the components Bx = 3.0 T, By = 1.5 T, and Bz = 2.0 T. What is the magnitude of the acceleration of the electron at this point?
a. 2.1 × 10^18 m/s2 b. 1.6 × 10^18 m/s2 c. 2.6 × 10^18 m/s2 d. 3.2 × 10^18 m/s2 e. 3.7 × 10^18 m/s2