That the Tharsis region on Mars has so few craters
A) suggests it is the youngest region on the planet.
B) suggests it is at the center of a particularly strong magnetic field.
C) is due to annual flooding and water erosion.
D) proves tectonic activity is taking place.
E) is due to the very low elevation of the region.
A
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A freely-falling object has a speed of 30 m/s at one instant. Exactly 2 seconds later its speed will be
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