   Chapter 31, Problem 82PE

Chapter
Section
Textbook Problem

Unreasonable ResultsA frazzled theoretical physicist reckons that all conservation laws are obeyed in the decay of a proton into a neutron, positron, and neutrino (as in (+ decay of a nucleus) and sends a paper to a journal to announce the reaction as a possible end of the universe due to the spontaneous decay of protons. (a) What energy is released in this decay? (b) What is unreasonable about this result? (c) What assumption is responsible?

To determine

(a)

The energy released in decay.

Explanation

Given info:

The given proton decay is

pn+β++νe

Formula used:

The energy released

E=Δmc2

E=(mpmnmβ+mνe)c2

Calculation:

Substituting the masses

E=(1

To determine

(b)

The unreasonable result in the energy value.

To determine

(c)

The cause of unreasonable result.

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