The proton-proton chain is ________
A) another name for the force that holds protons together in atomic nuclei
B) the linkage of numerous protons into long chains
C) the specific set of nuclear reactions through which the Sun fuses hydrogen into helium
D) an alternative way of generating energy that is different from the fusion of hydrogen into helium
C
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In what way is the rocky material of Jupiter's core different from the rocks found on Earth?
a. It is much cooler because Jupiter is further from the sun. b. It contains more liquid water. c. It is much hotter and denser because of the extreme pressure at the core of Jupiter. d. It is not composed of iron and nickel because this material will float of the surface e. It is composed entirely of ices that have frozen into a large rock like structure.
A solar mass star will evolve off the main sequence when:
A) it completely runs out of hydrogen. B) it expels a planetary nebula to cool off and release radiation. C) it explodes as a violent nova. D) it builds up a core of inert helium. E) it loses all its neutrinos, so fusion must cease.
Lillian safely touches a 100,000-volt Van de Graaff generator. Although the voltage is high, the relatively small amount of charge means a relatively small amount of
A) energy transfer. B) electric field. C) polarization. D) conduction.
Why must you use the same reference point b g h0 on the spring for each subsequent height measurement?