Precipitation exceeds evaporation over the
A) continents.
B) polar ice caps.
C) oceans.
D) equator.
Answer: A
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The Doppler effect in the spectra of quasars show very high _______________
Fill in the blank(s) with correct word
A possible means of spaceflight is to place a perfectly reflecting aluminized sheet into Earth orbit and use the light from the Sun to push this solar sail. If a huge sail of area 6.00 × 105 m2 and mass 6000 kg were placed into orbit and turned toward the Sun, what would be the force exerted on the sail? (Assume a solar intensity of 1380 W/m2.)
What will be an ideal response?
A satellite is placed in a geosynchronous orbit. In this equatorial orbit with a period of 24 hours, the satellite hovers over one point on the equator. Which statement is true for a satellite in such an orbit?
a. There is no gravitational force on the satellite. b. There is no acceleration toward the center of the Earth. c. The satellite is in a state of free fall toward the Earth. d. There is a tangential force that helps the satellite keep up with the rotation of the Earth. e. The force toward the center of the Earth is balanced by a force away from the center of the Earth.
When an object such as a monkey wrench is tossed into the air, the wrench:
a. translates around its center of mass while the center of mass rotates around a point in the wrench. b. rotates around its center of mass while its center of mass undergoes translational motion. c. undergoes rotational motion around an imaginary point in space. d. undergoes either translational motion or rotational motion, not both. e. undergoes translational motion that depends on the rotational motion around the center of mass.