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jeremytheprimerapper
27.10.2020 •
Chemistry
How do you start the reaction in a glow stick
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Ответ:
crack the glow stick.
Explanation:
it breaks the glass inside mixing the 2 chemicals. which makes it glow
Ответ:
The Doppler red-shift of light observed from distant stars and galaxies gives evidence that the universe is expanding (moving away from a central point). This allows for Big Bang Theory, because after a “bang” occurs all of the matter moves away from the point of origin.
The American astronomer Edwin Hubble made the observations in 1925 and was the first to prove that the universe is expanding. He proved that there is a direct relationship between the speeds of distant galaxies and their distances from Earth. This is now known as Hubble's Law.
Explanation: