i) Determine the efficiency of the "annihilation" of a positron with an electron via the reactionee → 2y (taking the two gamma rays as the energy produced)

College Physics
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ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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class notes to determine the amount
2 neutrinos produced in a ppl chain.
c) Determine the number of H nuclei that need to be consumed every second to
power the luminosity of the Sun (L. = 3.828 × 10²6 W)
d) Convert the result found in c) in kg of hydrogen consumed per second.
e) Use the result found in d) to estimate the Main Sequence lifetime of the Sun by
assuming that it will consume about 10% of its total mass before running out of H
in its core. Express your result in seconds.
f) Does the result found in e) make sense when you convert it into years?
g) Determine the "efficiency" of the ppl chain by calculating the ratio
(energy produced in J)/ (mass of fuel consumed in kg).
h) Compare the efficiency found in g) to the efficiency of a typical chemical reaction
such as the burning of graphite: C+02 CO₂ +AE (AE = 393.5 kJ/mol).
@
i) Determine the efficiency of the "annihilation" of a positron with an electron via
the reaction: ete → 2y (taking the two gamma rays as the energy produced)
j) Convert the results found in parts g) and h) into %, considering the % efficiency
of a reaction is 100% when all the matter is destroyed to be converted into energy
(as is the case with et + e→ 2y).
jw=f
2
m(²)
BE
Hilroy
S
MAA
Transcribed Image Text:class notes to determine the amount 2 neutrinos produced in a ppl chain. c) Determine the number of H nuclei that need to be consumed every second to power the luminosity of the Sun (L. = 3.828 × 10²6 W) d) Convert the result found in c) in kg of hydrogen consumed per second. e) Use the result found in d) to estimate the Main Sequence lifetime of the Sun by assuming that it will consume about 10% of its total mass before running out of H in its core. Express your result in seconds. f) Does the result found in e) make sense when you convert it into years? g) Determine the "efficiency" of the ppl chain by calculating the ratio (energy produced in J)/ (mass of fuel consumed in kg). h) Compare the efficiency found in g) to the efficiency of a typical chemical reaction such as the burning of graphite: C+02 CO₂ +AE (AE = 393.5 kJ/mol). @ i) Determine the efficiency of the "annihilation" of a positron with an electron via the reaction: ete → 2y (taking the two gamma rays as the energy produced) j) Convert the results found in parts g) and h) into %, considering the % efficiency of a reaction is 100% when all the matter is destroyed to be converted into energy (as is the case with et + e→ 2y). jw=f 2 m(²) BE Hilroy S MAA
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