Halley's comet moves about the sun in an elliptical orbit with its closest approach to the sun being 0.59 A.U. and its furthest distance being 35 A.U. [1 Astronomical Unit (A.U.) is the Earth-sun distance.] If the comet's speed at closest approach is 54 km/s, what is its speed when it is farthest from the sun?
910 m/s
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An electron-volt is
A) the charge of one electron. B) the energy of one electron. C) the energy jump between the first and second energy levels of hydrogen. D) an amount of energy much smaller than a joule. E) an amount of energy much larger than a joule.
Both nuclear reactors and atomic bombs use nuclear chain reactions
a. True b. False Indicate whether the statement is true or false
In order to trap the starship Enterprise, the diabolical Klingons build a huge ideal solenoid 10 light-years long with a diameter of 2.0 million kilometers. Every kilometer of length of the solenoid contains 100 turns of wire
What magnetic field strength is produced near the center of the solenoid using a current of 2.00 kA? (?0 = 4? × 10-7 T ? m/A)
In discussing the electron double-slit experiment, we studied a graph of the extended wave pattern formed on the screen by each electron's matter field
Did this graph show a single electron's matter field just before, or just after, the electron strikes the screen, and why? A) This is the matter field just after impact, because each electron actually spreads out over a large region and strikes all over this region, in a wave pattern. B) This is the matter field just before impact; after impact, the electron acquires a definite velocity. C) This is the matter field just before impact; after impact the matter field transforms into two distinct parts, with one part appearing on the screen directly behind each slit. D) This is the matter field just after impact, because the electron can strike the screen at a wide variety of specific places, and these places form a field pattern. E) This is the matter field just before impact; after impact the matter field collapses into a small region around the impact.