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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

(a) How many 239Pu nuclei must fission to produce a 20.0−kT yield, assuming 200 MeV per fission? (b) What is the mass of this much 239Pu?

To determine

(a)

The number of P239u nuclei that must undergo fission to produce a 20.0 kT yield assuming 200 MeV per fission.

Explanation

Given:

The energy yield of the bomb

  E=20.0 kT

Energy per fission

  E0=200 MeV

Formula used:

The number of nuclei that undergo fission is given by

  n=EE0

Calculation:

Express the energy yield of the bomb in MeV.

  E=20.0 kT×4.184× 10 12J1 kT×1 MeV1.6× 10 13J=5

To determine

(b)

The mass of P239u required to produce an yield of 20.0 kT.

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