Why can't any star, no matter how massive, fuse elements heavier than iron?
A) because the nucleons within iron have the least mass possible
B) because elements heavier than iron have less average mass per nucleon
C) It could happen, we just have not yet observed a star massive enough to do this.
D) Actually, this occurs on a regular basis, which explains the great abundance of heavy elements.
s on a regular basis, which explains the great abundance of heavy
Answer: A
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A) the value of the expansion rate of the universe B) the value of the acceleration of the universe C) the value that measures the strength of gravity across the universe D) the size of the cosmological horizon E) a repulsive force that counteracts gravity and was introduced to allow for a static universe
Electromagnetic waves are longitudinal
Indicate whether the statement is true or false
The energy in the water at the top of a waterfall is an example of __________ energy
Fill in the blank(s) with correct word
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What will be an ideal response?