Essential University Physics
4th Edition
ISBN: 9780134988566
Author: Wolfson, Richard
Publisher: Pearson Education,
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Chapter 39, Problem 21E
To determine
The estimation of volume of the 50,000 tons of water used in Super Kamiokande experiment.
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A state-of-the-art proton decay experiment is expected to detect 55% of the proton decays in a body of water. Assuming protons have a lifetime of 1031 years, how many m3 of water would you need in order to see 5 decays per month? (Assume a "month" is one-twelfth of a year.)
Express your answer in scientific notation using two significant figures (e.g. 13680.3 would be expressed as 1.4*10^4).
=
U is for Uranium. Natural uranium consists of 235U (percent abundance P₁ = 0.7300%, A₁ =
3.12 x 10-¹7 [s-¹]) and 233U (percent abundance P₂ = 99.27%, 2₂ = 4.92 × 10-¹8 [s-¹]).
Consider the time when Earth was formed 4.5 billion years ago.
Setup the time dependence of percent abundance of the two uranium isotopes. Use №₁ and N₂
as current particle count of the isotopes (use №₁,0 and N₂,0 for the initial particle count back
when Earth was formed)
Then, Compute for the initial percent abundance of each uranium isotopes when the Earth was
formed.
A state-of-the-art proton decay experiment is expected to detect 44% of the proton decays in a body of water. Assuming protons have a lifetime of 1031 years, how many m3 of water would you need in order to see 2 decays per month? (Assume a "month" is one-twelfth of a year.)
Chapter 39 Solutions
Essential University Physics
Ch. 39 - Prob. 1FTDCh. 39 - Prob. 2FTDCh. 39 - Prob. 3FTDCh. 39 - Prob. 4FTDCh. 39 - Name the fundamental force involved in (a) binding...Ch. 39 - Prob. 6FTDCh. 39 - Prob. 7FTDCh. 39 - Prob. 8FTDCh. 39 - Describe the origin of the cosmic microwave...Ch. 39 - The radiation that we observe as the cosmic...
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