An unstable particle initially at rest breaks up into two fragments. The mass of one fragment is 1.75 × 10^–28 kg and the mass of the other fragment is 1.25 × 10^–27 kg. The lighter fragment has a speed of speed 0.850c. What is the speed of the heavier fragment?
a. 0.229c
b. 0.119c
c. 0.127c
d. 0.220c
d
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If the electric field just outside a thin conducting sheet is equal to 1.5 N/C, determine the surface charge density on the conductor.
A. 53 pC/m2 B. 27 pC/m2 C. 35 pC/m2 D. 13 pC/m2 E. 6.6 pC/m2
A spear is thrown by you at a very high speed. As it passes, you measure its length at 1?2 its normal length. From this you conclude that the moving spear's mass must be
A. one-half its rest mass. B. twice its rest mass. C. four times its rest mass. D. None of these choices are correct.
Vision Problems: What power (in diopters) of corrective contact lens is required to correct the vision of a myopic eye whose far point is at 170 cm?
Fill in the blank(s) with the appropriate word(s).
Why was it thought that Titan may have oceans of methane?
A) Titan's atmosphere contains traces of methane. Similarly, Earth's atmosphere contains traces of water vapor. So, scientist thought Titan should have methane oceans. B) The atmospheric pressure at Titan's surface and its surface temperature are such that methane should be liquid on Titan's surface. C) The abundance of hydrocarbons in the atmosphere of Titan, led scientists to believe that Titan had an abundance of methane on its surface. D) Titan's atmosphere is like Earth's (mostly nitrogen), but its temperature is too low for water to be in the liquid phase. The only other possible liquid was methane. E) Since Saturn has methane ice in its atmosphere, methane should be abundant in this region of the solar system. The sheer abundance of methane in the region led scientists to hypothesize methane oceans on Titan.