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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsNuclear physicsMedium2 minQB

PhysicsMediumsingle choice

A uranium nucleus $^{235} U$ liberates 200 MeV per fission. 1.5 kg of uranium reacts during explosion of a uranium bomb. What is the mass of an equivalent TNT bomb if the heating capacity of TNT is $4.1 \times 1 0^{6} J / kg$ ?

Options:

Answer:

Solution:

Energy released: $E = \frac{1.5 \times 1 0 ^{3}}{235} \times N_{A} \times 200 M e V = 1.2 \times 1 0^{14} J$

Equivalent TNT mass: $m = \frac{1.2 \times 1 0 ^{14}}{4.1 \times 1 0 ^{6}} = 3 \times 1 0^{7} k g$ (option B).

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Nuclear physics

⏱ 2mℹ️ Source: QB

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