The big bang only created hydrogen and helium (with miniscule amounts of lithium) because____
a. gamma ray photons disrupt large nuclei more easily
b. antimatter is attracted to large nuclei, leaving only light nuclei
c. heavier elements can only be formed through fusion
d. elements with an atomic weight of 5 or 8 are unstable
e. temperatures were high enough to fuse hydrogen, but not helium
d
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If the displacement of an object, x, is related to velocity, v, according to the relation x = Av, the constant, A, has the dimension of which of the following?
a. acceleration b. length c. time d. area
Where do the majority of naked-eye stars fall on the H-R diagram? Is this true of the majority of stars close to our Sun as well?
What will be an ideal response?
The heaviest nuclei of all are formed
A) in the horizontal branch. B) in dense white dwarfs. C) during nova explosions. D) in the ejection of matter in the planetary nebula. E) in the core collapse that set the stage of Type II supernovae.
As a 2.0-kg object moves from 
m to 
m, the constant resultant force acting on it is equal to 
align="middle" /> N. If the speed of the object at the initial position is 4.0 m/s, what is its kinetic energy at its final position? A. 62 J B. 53 J C. 73 J D. 86 J E. 24 J