Just after an alpha particle leaves the nucleus, would you expect it to speed up? Why?
A. Yes. Once the alpha particle leaves the nucleus, there are no more forces acting on it and it therefore accelerates.
B. No. As the alpha particle leaves the nucleus, it is slowed by the constant attraction of the electrons surrounding the nucleus.
C. Yes. Once the alpha particle leaves the nucleus, it accelerates because of mutual electric repulsion with the nucleus from which it escaped.
D. No. Once the alpha particle leaves the nucleus, it is slowed by the repulsion of the next closest atom's nucleus.
Answer: C
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Which of the following describes the state of the atmosphere when the upward-directed pressure gradient force is in balance with the downward pull of gravity?
A. unstable equilibrium B. isobaric balance C. hydrostatic equilibrium D. geostrophic balance
Blood in the right atrium of the heart will be pumped to
A. arteries going to the lungs. B. the right ventricle. C. the left ventricle. D. arteries going to body tissues.
Endemic species are particularly vulnerable to extinction.
Answer the following statement true (T) or false (F)
Which of the following statements best describes the relationship between the topography of a region and the underlying structural geology?
A) Upfolds in the rock will make mountains and downfolds will make valleys. B) Downfolds in the rock will make mountains and upfolds will make valleys. C) There is no relationship between structures and topography.