People settle on floodplains because
A) the chance of flooding is very rare.
B) floodplain soil is nutrient rich and good for agriculture.
C) of river access.
D) river access and rich soils.
Answer: D
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There is a greater proportion of carbon-14 in
A) new bones. B) old bones. C) same in each
If the collapsing star is over 25 solar masses, the core may form ________ in a hypernova event
A) a gamma-ray burster B) a millisencond pulsar C) an X-rays burster D) a pulsar E) a black hole
Which of the following statements about carbon-14 dating is true?
A) Carbon-14 dating is very accurate because the amount of carbon-14 in the atmosphere is constant. B) Carbon-14 can be used to date anything younger than 50,000 years. C) Carbon-14 dating can be used to date stone tools as well as bone. D) all of the above E) none of the above
A copper specimen is stressed in tension to 76×106 Pa and a total strain of 0.01; then the specimen is unloaded. We observe after the test that the deformation was uniform. Determine the expected recovered elastic strain and the permanent plastic strain.
What will be an ideal response?