Hydrogen, helium, and nuclear fusion
The answer is that "since they do not interact with the electromagnetic force, they do not feel friction or drag and hence do not contract with the rest of the protogalactic cloud." WIMPs (Weakly-Interacting Massive Particles) are hypothetically constituted to dark matter. It is in their nature to be less interactive, so they are scattered throughout galactic halos and not focused into the galaxy's disk.
Answer:
A bike race
Explanation:
Over the course of 23 days, men bike while occasionally passing through other countries in the 3 week long bike race. It is annually held in France, Tour de France just means Tour of France since it goes around the whole country. This year it will be from May 30 to June 6.
Groundwater contamination occurs when man-made products such as gasoline, oil, road salts and chemicals get into the groundwater and cause it to become unsafe and unfit for human use. ... Road salt, toxic substances from mining sites, and used motor oil also may seep into groundwater.
(Didn’t apply the statements so I answered the question hope I helped!)
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