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Answer the following statement true (T) or false (F)
True
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Each Voyager spacecraft carries a "postcard" designed to be understandable to any aliens that might someday encounter it. On the "postcard," scientists pinpointed the location of Earth by triangulating it between pulsars. Why did the scientists choose pulsars rather than some other type of star?
A) Pulsars are easy to identify by their almost perfectly steady periods of pulsation. B) Pulsars are very bright and therefore easy to find. C) Several pulsars are located within a dozen light-years of our solar system, making them useful for finding our solar system. D) We're pretty sure that aliens will have only radio telescopes and not optical telescopes, so they'll have a better chance of seeing pulsars than ordinary stars.
Two equal positive charges are held in place at a fixed distance
If you put a third positive charge midway between these two charges, its electrical potential energy of the system (relative to infinity) is zero because the electrical forces on the third charge due to the two fixed charges just balance each other. A) True B) False
For the tapered fin shown, determine the temperature distribution, the fin efficiency, and the heat transfer through the fin.
What will be an ideal response?
At what altitude should a satellite be placed into circular orbit so that its orbital period is 48.0 hours? The mass of the earth is 5.976 × 1024 kg and the radius of the earth is 6.378 × 106 m
A) 4.22 × 107 m B) 7.58 × 107 m C) 8.22 × 107 m D) 6.07 × 107 m E) 6.71 × 107 m