Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 5, Problem 9P
At time t = 0 a sample contains 3.57 × 108 nuclei of a particular nuclide. Exactly one year later the sample contains 3.09 × 108 nuclei of the same species. Calculate the half-life of the decay.
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Subject is environmental engineering
Chapter 5 Solutions
Sustainable Energy
Ch. 5 - Prob. 1PCh. 5 - Prob. 2PCh. 5 - A sample of 137Cs (half-life = 30.1 years) decays...Ch. 5 - Prob. 4PCh. 5 - What are the decay products of the decay of the...Ch. 5 - Prob. 6PCh. 5 - Nuclide A has a half-life of 4 days, and nuclide B...Ch. 5 - 64Cu can decay by both decay and + decay. Draw an...Ch. 5 - At time t = 0 a sample contains 3.57 108 nuclei...Ch. 5 - Prob. 10P
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- The radioactive isotope of lead, PB-209, decays at a rate proportional to the amount present at time tand has a half-life of 3.3 hours. If 1 gram of lead is present initially, how long will it take for 90% of the lead to decay?arrow_forward3. A certain radioactive material is known to decay at a rate proportional to the amount present. If initially there is 50 mg of the material present and after 2 hours it is observed that the material lost 20% of its original mass, a) find the mass of the material after 5 minutes, and b) the time at which the material has decayed to one-half of its initial mass.arrow_forwardWhat is the term for the process by which a radioactive nucleus emits an alpha particle consisting of two protons and two neutrons? a) Alpha decay b) Beta decay c) Gamma decay d) Electron capture.arrow_forward
- 64Cu can decay by both decay and + decay. Draw an appropriate portion of a Segr plot along the lines of Figure 5.3 showing these two decay processes.arrow_forwardQuestion 1 An atom in the ground state O has all electrons in the n 1 orbit O has all electrons in the lowest energy orbits possible O is finely divided O will not absorb electromagnetik radiation of any wavelength Question 2 Which of the following transitions in the Bohr hydrogen atom model affords emission of the highest-energy photon? (R, = 2.18 x 10 1ª j) Oni-6 1 O ni-1+nf-6arrow_forwardA hypothetical metal A with a BCC lattice structure has a density of 8.87 g/cm3 If a hypothetical metal B with an FCC lattice structure is created with a different element that has almost the same atomic mass (g/mole) and almost the same atomic radius, what is the density of metal B? Justify your answer.arrow_forward
- Consider a copper wire with a diameter of 1.99 mm. (a) What is the drift speed of the electrons in the copper wire when a current of 13.0 A flows through it? Assume that each copper atom contributes one free electron to the metal. The density of copper is 8.92 g/cm³. x How is the drift speed related to the current flowing in a wire? Consider the fact that there is one free electron per copper atom when determining the charge density. m/s (b) How does this drift speed compare to the random rms speed of an electron at 20.0°C? To make this comparison, determine the random rms speed of an electron at 20.0°C using the ideal gas model and find the ratio of the two speeds. Vims Vdarrow_forwardHemoglobin in our blood exist in two predominant forms.one form,known as oxyhemoglobin, has oxygen bound to the iron and the other,known as deoxyhemoglobin has water molecule bound instead.Oxyhemoglobin is a low spin complex that gives arterial blood its red colour, and deoxyhemoglobin is a high spin complex that gives venus blood its darker colour.Explain these observations in terms of the crystal field splitting.arrow_forwardThe concentration of a certain chemical in a sealed tank follows the expression C(t) = Co exp (-kit), where kı is the decay constant of this chemical in hours'. Rewrite this equation for C(t) as a function of only the half-life t12 as a given constant.arrow_forward
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