Nuclear fusion is the process by which
A) electrons are rearranged inside an atom, releasing energy
B) a number of smaller nuclei combine to form a larger nucleus with the release of energy
C) an electron is ejected from the nucleus of an atom, releasing energy
D) large nuclei break up into smaller nuclei with the release of energy
B
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This Hubble Space Telescope photo shows a planetary nebula. What is the white dot in the center (indicated by the arrow)?
A) a white dwarf B) a red giant star with a strong stellar wind C) a neutron star D) a protostar that will soon become a main-sequence star
Pluto is different from the outer planets in all of the following ways except which one?
A) Its surface temperature is very cold. B) It is made mostly of ices. C) Its orbit is not very close to being circular. D) It has few moons. E) It doesn't have rings.
How much charge must pass by a point in a wire in 10 s for the current through the wire to be 0.50 A?
A) 20 C B) 2.0 C C) 5.0 C D) 0.050 C
Two parallel surfaces are separated by 1 m. One of the surfaces has a temperature of 177ºC and the other surface is 27ºC. A heat shield is placed midway between the two surfaces. Estimate the shield temperature.
What will be an ideal response?