All of the universe’s original supply of hydrogen came from?
1) The space-time continuum
2) A parallel universe
3) The Big Bang
4) black holes
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Ответ:
Hydrogen is the simplest element in the Universe: it has just one electron orbiting a nucleus of one single proton. It's also the most abundant (helium comes in at a distant second). Immediately after the Big Bang,
Ответ:
EMF radiations
Explanation:
Electric and magnetic fields (EMFs) radiation is a terms collectively used for invisible energy waves governed by electricity and magnetic forces. These radiations are usually produced when some thing is operated by use of electrical power.
In watches , mercury or other ionizing battery cells are used to power the watch and hence it can be stated that EMF radiation are most useful to investigate.
Some time high frequency waves such as ultraviolet rays and X-rays are considered as form of EMF waves