Which of the following choices is not a way by which we can study the inside of the Sun?
A) We can probe the interior of the Sun by studying the vibrations in its photosphere.
B) We can make a computer model of the Sun's interior that allow us to predict the observable properties of the Sun.
C) We can send a space probe into the Sun's photosphere.
D) We can study solar neutrinos.
C
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Where on the ecliptic is the vernal equinox located?
High-mass stars fuse hydrogen into helium through the CNO cycle rather than solely by the proton-proton chain. Which property of the CNO cycle explains why high mass stars have much shorter lives than low mass stars?
A) The CNO cycle is only possible when the abundance of CNO elements is very high. B) The CNO cycle is very fast at converting hydrogen to helium. C) The CNO cycle is very fast at converting hydrogen to carbon, nitrogen, oxygen (CNO). D) The CNO cycle is only possible when the star has lived for a very long time.
Listed following are several objects in the solar system. Rank these objects from left to right based on their orbital period around the Sun from shortest to longest.
A lithium atom, mass 1.17 × 10-26 kg, vibrates with simple harmonic motion in a crystal lattice, where the effective force constant of the forces on the atom is k = 49.0 N/m
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, h = 1.055 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) (a) What is the ground state energy of this system, in eV? (b) What is the wavelength of the photon that could excite this system from the ground state to the first excited state? What will be an ideal response?