Question 1The sun generates its energy through nuclear fusion, making helium from hydrogen. The main process by which this happens, called the proton-proton chain, goes as follows:• Two protons come together to create deuterium, a positron, a neutrino, and energy: p + p→D+e++v+ energy• The deuterium fuses with another proton to make ³He: D + p→→ ³He + energy• Fianlly, 4He is produced by fusing two ³He nuclei together: ³He + 3 He→ 4He+p+p+ energyWhat is the total energy released during the creation of one 4He nucleus? Give your answer in MeV, and remember that you need to make two ³He nuclei in the process. Be sure to use at leastfive significant figures for your masses, but your final answer should have three or four sig figs.Question 2Nuclear medicine often uses radioactive samples as a tracer to monitor processes inside the body. Suppose a nuclear reactor makes a certain isotope sample with an initial activity of 152mci, and the sample gets delviered to a hospital 16.5 hours later, when its activity has become 72.6 mCi. Luckily, the sample remains usable until its activity drops below 17.2 mCi. How longafter the delivery is this sample usable?

Answered: Image /qna-images/answer/7b675b75-7096-4e45-971d-2c6a35ee6fd3.jpg

The sun generates its energy through nuclear fusion, making helium from hydrogen. The main process by which this happens, called the proton-proton chain, goes as follows: •Two protons come together to create deuterium, a positron, a neutrino, and energy: p + p→D+e++v+ energy The deuterium fuses with another proton to make ³He: D + p³He + energy Fianlly, 4He is produced by fusing two 3He nuclei together: ³He + ³He 4He+p+p+ energy What is the total energy released during the creation of one 4He nucleus? Give your answer in MeV, and remember that you need to make two 3He nuclei in the process. Be sure to use at least five significant figures for your masses, but your final answer should have three or four sig figs.

The sun generates its energy through nuclear fusion, making helium from hydrogen. The main process by which this happens, called the proton-proton chain, goes as follows: •Two protons come together to create deuterium, a positron, a neutrino, and energy: p + p→D+e++v+ energy The deuterium fuses with another proton to make ³He: D + p³He + energy Fianlly, 4He is produced by fusing two 3He nuclei together: ³He + ³He 4He+p+p+ energy What is the total energy released during the creation of one 4He nucleus? Give your answer in MeV, and remember that you need to make two 3He nuclei in the process. Be sure to use at least five significant figures for your masses, but your final answer should have three or four sig figs.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

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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Concept explainers

Radioactive decay

The emission of energy to produce ionizing radiation is known as radioactive decay. Alpha, beta particles, and gamma rays are examples of ionizing radiation that could be released. Radioactive decay happens in radionuclides, which are imbalanced atoms. This periodic table's elements come in a variety of shapes and sizes. Several of these kinds are stable like nitrogen-14, hydrogen-2, and potassium-40, whereas others are not like uranium-238. In nature, one of the most stable phases of an element is usually the most prevalent. Every element, meanwhile, has an unstable state. Unstable variants are radioactive and release ionizing radiation. Certain elements, including uranium, have no stable forms and are constantly radioactive. Radionuclides are elements that release ionizing radiation.

Artificial Radioactivity

The radioactivity can be simply referred to as particle emission from nuclei due to the nuclear instability. There are different types of radiation such as alpha, beta and gamma radiation. Along with these there are different types of decay as well.

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