Physics, 16.09.2019 16:20 OwONuzzlez
plutonium-239 is a radioactive isotope commonly used as fuel in nuclear reactors. the half-life of plutonium-239 is 24,100 years. about how long would it take 504 grams of plutonium-239 to decay until there were only 63 grams plutonium-239 left?
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Physics, 22.06.2019 10:00
This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !
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Physics, 22.06.2019 16:00
Which composition of water moves to begin a deepwater current?
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Physics, 23.06.2019 02:40
Estimate the kinetic energy of the neptune with respect to the sun as the sum of the terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. [assume the neptune is a uniform sphere with mass = 1.0×1026 kg , radius = 2.5×1010 m , rotation period 16.1 h , orbital period 6.01×104 d and is 4.6×109 km from the sun.]
Answers: 2
plutonium-239 is a radioactive isotope commonly used as fuel in nuclear reactors. the half-life of...
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