Biology

Biology, 22.07.2019 14:30, destanie1030

The most effective shape for achieving critical mass is a

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Biology, 30.06.2019 10:30, allisondelv67

Uranium-235 undergoes fission to produce two neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 0.5 neutrons per fission event, which of the following will be effective at achieving a critical mass? check all that apply.surround the sample with a deflective material to prevent neutrons from escaping to the surroundings.add more absorbent material.compress the uranium-235 sample.

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Physics, 30.07.2019 23:30, quickestlearner6036

Listed following are three possible models for the long-term expansion (and possible contraction) of the universe in the absence of dark energy. rank each model from left to right based on the ratio of its actual mass density to the critical density, from smallest ratio (mass density much smaller than critical density) to largest ratio (mass density much greater than critical density). (a) coasting universe (b) critical universe (c) recollapsing universe

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Physics, 06.08.2019 03:10, lisacarter0804

Listed following are three possible models for the long-term expansion (and possible contraction) of the universe in the absence of dark energy. rank each model from left to right based on the ratio of its actual mass density to the critical density, from smallest ratio (mass density much smaller than critical density) to largest ratio (mass density much > critical recollapsing universe- critical universe- coasting universe

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Social Studies, 06.10.2019 08:10, micahatwood03

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass

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