Uniform Circular Motion: The maximum acceleration a pilot can stand without blacking out is about 7.0 g. In an endurance test for a jet plane's pilot, what is the maximum speed he can tolerate if he is spun in a horizontal circle of diameter 85 m?
Fill in the blank(s) with the appropriate word(s).
54 m/s
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Consider a star with 2 identical planets, both with nearly circular orbits, except the orbit of Planet A is closer to the star than the orbit of Planet B. Which of the following statements is true?
A) Planet A is moving slower than Planet B. B) Planet A moves with the same speed as Planet B. C) Planet A is moving faster than Planet B.
The magnifying power of a telescope equals:
A) the diameter of the primary lens or mirror of the telescope. B) the focal length of the primary mirror or lens divided by the focal length of the eyepiece. C) the diameter of the eyepiece of the telescope. D) the focal length of the eyepiece divided by the focal length of the objective of the telescope.
For which of these forms of life is it hardest to apply present criteria for life, based on its behavior when isolated?
A) a bacterial spore B) a plant seed C) a virus D) a fungus spore E) a slime mold
Compared to life today the rate of diversification in early organism was probably
A) exactly the same as it is today B) much slower than it is today C) much faster than it is today D) just slightly slower than it is today