Modern Physics
3rd Edition
ISBN: 9781111794378
Author: Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher: Cengage Learning
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Chapter 14, Problem 57P
To determine
The expressions for the fraction of the total kinetic energy that is carried by the both masses.
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Assume that immediately after the fission of 236U according to Eq. 43-1, the resulting 140Xe and 94Sr nuclei are just touching at their surfaces. (a) Assuming the nuclei to be spherical, calculate the electric potential energy associated with the repulsion between the two fragments. (b) Compare this energy with the energy released in a typical fission event.
A by-product of some fission reactors is the isotope 94239Pu, which is an alpha emitter with a half-life of 24 000 years: Consider a sample of 1.0 kg of pure 94239Pu at t = 0. Calculate (a) the number of 94239Pu nuclei present at t = 0 and (b) the initial activity of the sample. (c) How long does the sample have to be stored if a “safe” activity level is 0.10 Bq?
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Chapter 14 Solutions
Modern Physics
Ch. 14 - Prob. 1QCh. 14 - Prob. 2QCh. 14 - Prob. 3QCh. 14 - Prob. 4QCh. 14 - Prob. 5QCh. 14 - Prob. 7QCh. 14 - Prob. 8QCh. 14 - Prob. 9QCh. 14 - Prob. 10QCh. 14 - Prob. 11Q
Ch. 14 - Prob. 12QCh. 14 - Prob. 14QCh. 14 - Prob. 15QCh. 14 - Prob. 1PCh. 14 - Prob. 2PCh. 14 - Prob. 3PCh. 14 - Prob. 4PCh. 14 - Prob. 5PCh. 14 - Prob. 6PCh. 14 - Prob. 7PCh. 14 - Prob. 8PCh. 14 - Prob. 9PCh. 14 - Prob. 10PCh. 14 - Prob. 11PCh. 14 - Prob. 12PCh. 14 - The atomic weight of cadmium is 112.41, and its...Ch. 14 - Prob. 15PCh. 14 - Prob. 16PCh. 14 - Prob. 17PCh. 14 - Prob. 19PCh. 14 - Prob. 20PCh. 14 - Prob. 21PCh. 14 - Prob. 22PCh. 14 - Prob. 23PCh. 14 - Prob. 24PCh. 14 - Prob. 25PCh. 14 - Prob. 27PCh. 14 - Prob. 28PCh. 14 - Prob. 29PCh. 14 - Prob. 30PCh. 14 - Prob. 31PCh. 14 - Prob. 32PCh. 14 - Prob. 33PCh. 14 - Prob. 34PCh. 14 - Prob. 35PCh. 14 - Prob. 36PCh. 14 - Prob. 37PCh. 14 - Prob. 38PCh. 14 - Prob. 39PCh. 14 - Prob. 40PCh. 14 - Prob. 41PCh. 14 - Prob. 42PCh. 14 - Prob. 43PCh. 14 - Prob. 45PCh. 14 - Prob. 46PCh. 14 - Prob. 47PCh. 14 - Prob. 48PCh. 14 - Prob. 49PCh. 14 - Prob. 50PCh. 14 - Prob. 51PCh. 14 - Prob. 52PCh. 14 - Prob. 53PCh. 14 - Prob. 54PCh. 14 - Prob. 55PCh. 14 - Prob. 56PCh. 14 - Prob. 57PCh. 14 - Prob. 58PCh. 14 - Prob. 59PCh. 14 - Prob. 60P
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- The annual radiation dose from 14C in our bodies is 0.01 mSv/y. Each 14C decay emits a averaging 0.0750 MeV. Taking the fraction of 14C to be 1.31012N of normal 12C, and assuming the body is 13% carbon, estimate the fraction of the decay energy absorbed. (The rest escapes, exposing those close to you.)arrow_forwardAssume that the decay rate for Carbon 14 is k=0.00012. If charcoal found in an ancient fire pit retains 30% of its original C-14 radioactivity, how old is the fire pit?arrow_forwardThe Curiosity rover sent to explore the surface of Mars has an electric generator powered by heat from the radioactive decay of 238Pu, a plutonium isotope that decays by alpha emission with a half-life of 88 years. At the start of the mission, the generator contained 9.6 × 1024 nuclei of 238Pu. What was the approximate activity of the plutonium source at the start of the mission?A. 2 × 1021 Bq B. 2 × 1019 Bq C. 2 × 1017 BqD. 2 × 1015 Bq E. 2 × 1013 Bqarrow_forward
- A certain isotope has a half-life of 9.06 h. What is its decay constant in s-1?arrow_forwardAn artifact classified as charcoal, found in a site at Epirus, Greece, is found to have a 14C radioactivity of 4.36×10-2 counts per second per gram of carbon. If living carbon-containing objects have an activity of 0.255 counts per second per gram of carbon, estimate the age of the artifact? The half-life of 14C is 5730 years.arrow_forward
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