Physics, 24.01.2020 05:31 annafellows
Regarding the history of the universe, which of the following is true? regarding the history of the universe, which of the following is true? key elements of which earth and life are made, including carbon, oxygen, and iron, did not exist when the universe was born and were created later in stars. all the chemical elements were created during the big bang, but some have been modified since that time as a result of radioactive decay. the earth formed quickly after the big bang. all the current stars in our galaxy formed about the same time billions of years ago.
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The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force
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