Where would Class Ia be located on the H-R diagram?
a.
a line through the giants
b.
a horizontal line through the supergiants
c.
along the main sequence
d.
along the white dwarf line
B
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When comparing two gases at the same temperature, the gas with a higher molecular weight has more internal energy per mole
Indicate whether the statement is true or false
It is generally easier to push an object once it is moving than when you are getting it started. This is because
a. sliding friction is zero. b. sliding friction is less than static friction. c. static friction is less than sliding friction. d. static friction is zero.
In the context of nuclear fusion in massive stars, which of the following statements is true of carbon fusion?
A) At lower temperatures than carbon fusion, nuclei of oxygen, neon, and magnesium fuse to make iron. B) At lower temperatures than carbon fusion, iron can fuse to make silicon. C) As carbon is exhausted, core ignition and shell ignition continue with a series of heavier nuclei as fusion fuel. D) As soon as the carbon is exhausted in the core of massive stars, the core expands, and carbon ignition pauses.
Nuclear Binding Energy: The neutral helium atom, 
He, has a mass of 4.002603 u, a neutron has a mass of 1.008665 u, a proton has a mass of 1.007277 u, and a neutral hydrogen atom has a mass of 1.007825 u. What is the binding energy of the 
He nucleus? (1 u = 931.5 MeV/c2)
A. 20.5 MeV B. 22.4 MeV C. 27.3 MeV D. 28.3 MeV E. 23.4 MeV