B:2 it is measured by the crest of the wave or as I say the top of the wave
C causes central nervous system damage to humans
Answer:
1 = A
2 = B
3 = B
Explanation:
1) Black holes occur when really big stars collapse on themselves. And, in order to get big, the star has to be an old one.
2) A black hole is something huge that swallows up everything, while a protostar is just the very beginning of a star.
3) Scientist can't truly know for sure, but they can infer about them due to the effects of the surrounding areas.
A bond formed by the electrical attraction between two oppositely charged is?
(B) IONIC BOND
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