Explain how a seismograph records earthquakes?
What will be an ideal response?
Answer: A seismograph has a freely suspended weight that is connected to a support attached to bedrock. When seismic waves arrive and the earth moves, the rest of the seismograph will move, but inertia will keep the weight relatively stationary, allowing it to record the seismic data.
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When Lil pushes an object a certain distance while applying twice the force, she does
A. the same amount of work. B. four times as much work. C. twice as much work. D. none of the above
It is difficult to directly identify significant cloud and surface features on an infrared image when ____ differences are small
a. relative humidity b. air pressure c. wind d. precipitation e. temperature
In an electrically neutral atom,
A. the number of protons and the number of electrons are the same. B. the number of neutrons is equal to the sum of the number of protons and electrons. C. electrons and protons have no charge. D. the electron shells are completely filled.
Which of the following statements about old-growth forests is true?
A. Old-growth forests have been without disturbance of any kind for at least 100 years. B. Humans do not reside in old-growth forests. C. They include temperate rainforests, tropical rainforests, boreal forests, and deciduous forests. D. The largest remaining areas of old-growth forests are in North America. E. None of the above is true.