Momentum is transferred to the ground when an apple falls on it. The momentum absorbed by the ground is
A) negligible compared to the momentum of the apple.
B) greater than that of the apple only if the apple bounces.
C) greater than that of the apple in all cases.
D) none of the above
B
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Primate cities are found in the world's
A) core countries. B) peripheral countries. C) core and peripheral countries, both. D) North. E) South.
The pressure difference within a tornado can be as high as
A) 15 mb. B) 30 mb. C) 45 mb. D) 100 mb.
The largest mass extinction took place some 250 million years ago and wiped about 65% of the world's existing species.
Answer the following statement true (T) or false (F)
Why is the Moment magnitude scale favored over the Richter magnitude scale?
A) The Richter magnitude is based on older models of seismographs that are no longer used to record earthquakes. B) The Richter magnitude always underestimates the amount of energy released by an earthquake. C) The Moment magnitude measures the total energy released by an earthquake. D) The moment magnitude carries the calculated values out to more decimal places so it is more precise.