Where does nuclear fusion occur in the Sun?
A) on the surface
B) in a layer just below the surface
C) deep in its core
D) in a layer just above the visible surface
E) all of the above
C) deep in its core
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Structure 1 with member BC of length L/2 has force P1 applied at joint C. Structure 2 with member BC of length L has force P2 applied at C. Both structures have constant flexural rigidity EI. The required ratio of the applied forces P1/P2 so that joint B rotations ?B1 and ?B2 are equal is approximately:
(A) 1
(B) 5/4
(C) 3/2
(D) 2
Two stars, Betty and Wilma, are both on the main sequence. Betty is more luminous than Wilma
Which one has a hotter surface temperature? Which one is more massive? Which one is bigger? If they both formed at the same time, which one will evolve off the main sequence first?
What does Mercury most resemble in size and appearance?
A. Venus B. Mars C. Earth D. the Moon
A spacecraft has captured and brought material to Earth from a comet
Indicate whether the statement is true or false