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Nuclear energy Typeit
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At a distance of 5 m, the measured count rate of gamma radiation from a source is 15 count s-1. The background radiation count is 4 count -1. 2 m from the source, the measured count rate is count s-1.
The half-life of lithium-11 is 8.75 ms. The decay constant of lithium-11 is s-1.
The half-life of lead-192 is 3.51 minutes. An initial sample contains 38 000 000 atoms of lead-192. After 20 minutes, there will be atoms of lead-192 remaining.
After one week, the activity of a radioactive sample has reduced to 94 % of its original activity. The decay constant of the sample is × 10-7 s-1.
The radius of a lutetium-174 nucleus would be around fm.
Humanity uses an estimated 159 000 TWh of energy every year. The mass-equivalent to this energy is kg.
Vanadium-44 contains 23 protons and 21 neutrons, and has a mass of 43.97411 u. Vanadium-44 has a binding energy of MeV.
The half-life of lithium-11 is 8.75 ms. The decay constant of lithium-11 is s-1.
The half-life of lead-192 is 3.51 minutes. An initial sample contains 38 000 000 atoms of lead-192. After 20 minutes, there will be atoms of lead-192 remaining.
After one week, the activity of a radioactive sample has reduced to 94 % of its original activity. The decay constant of the sample is × 10-7 s-1.
The radius of a lutetium-174 nucleus would be around fm.
Humanity uses an estimated 159 000 TWh of energy every year. The mass-equivalent to this energy is kg.
Vanadium-44 contains 23 protons and 21 neutrons, and has a mass of 43.97411 u. Vanadium-44 has a binding energy of MeV.