A charged particle creates an electric ________ in the space around it
Fill in the blank(s) with correct word
field
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The Oort cloud is
A) a roughly spherical region larger than the orbit of Pluto that may contain a trillion comets. B) a region in the same plane as the planets that contains hundreds of thousands of comets. C) a circular region between the orbits of Mars and Jupiter that contains most known asteroids. D) the cloud of gas from which the solar system formed. E) a vast cloud of gas that encircles the solar system at a great distance from the Sun.
The outflow channels on Mars indicate a flood period in the history of Mars. During this time, based on the width and depth of the remaining riverbed, it is thought that the flow rate must have been
A) just a small trickle, barely more than a stream of water. B) moderate, about the flow rate of the Ohio River. C) fairly large, about the flow rate of the current Colorado River. D) significantly large, about the flow rate of the Amazon River. E) enormous, as much as 100 times the flow rate of the Amazon River.
Wave #1 has frequency f1 and wavelength ?1 . Wave #2 has frequency f2 = 6 f1 and wavelength ?2 = 2?1 . How does the speed v2 of wave #2 compare with the speed v1 of wave #1?
a. v2 = 12v1 b. v2 = 6v1 c. v2 = 1.5v1 d. v2 = v1/6
In a hydrogen atom, a given electron has n = 7. How many possible values can ? have?
A) 6 B) 7 C) 15 D) 98