Physics, 26.08.2021 15:40, madinaxoxo605
The material that formed the earth was created in a supernova explosion approximately 6 billion years ago. The two most common isotopes of uranium, 238U and 235U were created in roughly equal amounts. Today, the earth contains more than 100 times as much 238U as 235U. Which isotope has a longer half-life?
a. 235U has a longer half-life because more of it have decayed.
b. 235U has a longer half-life because less of it have decayed.
c. 238U has a longer half-life because less of it have decayed.
d. 238U has a longer half-life because more of it have decayed.
Answers: 1
Physics, 22.06.2019 08:50, potatoismeh1
You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a Γ b = 98k. what is the y-component of vector b?
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Physics, 22.06.2019 10:30, austinwst3
You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?
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Ihave this 50 question test the layer of earth's atmosphere where atoms and molecules escape into space is referred to as the a) exosphere b) ionosphere. c) mesosphere d) thermosphere
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The material that formed the earth was created in a supernova explosion approximately 6 billion year...
Mathematics, 28.12.2019 21:31
Mathematics, 28.12.2019 21:31
Mathematics, 28.12.2019 21:31