The Caloris Basin on Mercury covers a large region of the planet and contains relatively few smaller craters. From this, we conclude that
A) erosion destroyed most of the smaller craters that formed on the basin.
B) Mercury's atmosphere prevented smaller objects from hitting the surface.
C) only very large impactors hit Mercury's surface in the past.
D) the Caloris Basin formed toward the end of the heavy bombardment.
E) the Caloris Basin was formed by a volcano.
D) the Caloris Basin formed toward the end of the heavy bombardment.
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A car with a radio antenna 1.0 m long travels at 80 km/h in a locality where the Earth's magnetic field is 5.0 × 10?5 T. What is the maximum possible emf induced in the antenna as a result of moving through the Earth's magnetic field?
What will be an ideal response?
It is difficult to see the roadway when driving on a rainy night mainly because
A) light scatters from raindrops and reduces the amount of light reaching your eyes. B) of additional condensation on the inner surface of the windshield. C) the film of water on your windshield provides an additional reflecting surface. D) the film of water on the roadway makes the road less diffuse. E) none of the above
Angular magnification of a magnifying glass is largest when the image is at
A) the near point. B) the focal point. C) the pupil of the eye. D) infinity. E) the far point.
How does seafloor crust differ from continental crust?
A) Seafloor crust is thinner, younger, and higher in density. B) Seafloor crust is thicker, older, and higher in density. C) Seafloor crust is thicker, younger, and lower in density. D) Seafloor crust is thinner, older, and lower in density.