Peter tosses an egg against a sagging sheet. The egg doesn't break due to
A. reduced impulse.
B. reduced momentum.
C. both of these
D. neither of these
Answer: D
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Which of the following describes the process of electrical discharge during cloud-to-ground lightning?
A. The stepped leader travels downward, and the return stroke travels downward. B. The stepped leader travels upward, and the return stroke travels downward. C. The stepped leader travels downward, and the return stroke travels upward. D. The stepped leader travels upward, and the return stroke travels upward.
Some taboos against eating pork may be partly explained because
A) pigs are not well-suited to hot, arid environments. B) pigs did not originate from those regions. C) pigs are filthy animals. D) of genetically transmitted food allergies. E) other meats are preferred.
We can use X-rays to determine the internal structure of a mineral, and thereby ________.
A. change the mineral's structure. B. shrink the mineral. C. destroy the mineral. D. identify the mineral. E. change the mineral's composition.
A geologist working in an area finds gravels with gentle dips of about 5 degrees. She finds a large outcrop where these gravels are overlain by tephra with prominent layers that dip 35-40 degrees. What is the history of this area?
A) Before the gravel was deposited, a cinder cone formed in this area. B) After the gravel was deposited, a large composite cone was built on the area. C) After the gravel was deposited, a cinder cone formed in the area. D) Basalt flows formed after a series of gravels were deposited, covering the local terrain, and built a shield volcano.