(a) What is the decay constant of 238/92U whose half-life is 4.5 X 109 yr? (b) The decay constant of a given nucleus is 8.2 X 10 –5 s –1. What is its half-life?
Students also viewed these Modern Physics questions
A drug prepared for a patient is tagged with 99 43 Tc which has a half-life of 6.05 h. (a) What is the decay constant of this isotope? (b) How many 99 43 Tc nuclei are required to give an activity of 1.50 µCi?
What is the decay constant for 131 if the half-life is 2.305 days? 9.31x 10-5 s1 3.48 x 1065-1 4.81x 10-45-1 9.98 x 10 75-1 01 points Of the following complex ions: [CrC(NH3)5R+,(Cr{NH3)6*,ICrCIH2Ols2t,(CrH2016*, one appears yellow, one pink, one violet, and one blue-green. Which is yellow? both...
Toys Unlimited Corp. reported the following for the year ended March 31, 2015: i. Loss due to earthquake ii. Extremely large bad debt expense due to loan defaults iii. Gain on sale of equipment iv. Loss on closure of retail stores in Fredericton (the company has other retail locations) v. Loss on...
Dos Passos Company sells televisions at an average price of $900 and also offers to each customer a separate 3-year warranty contract for $90 that requires the company to perform periodic services and to replace defective parts. During 2020, the company sold 300 televisions and 270 warranty...
For the following exercises, construct functions that model the described behavior. A population of lemmings varies with a yearly low of 500 in March. If the average yearly population of lemmings is 950, write a function that models the population with respect to t, the month.
Performance Measures. Information from the Form 990 for the American Heart Association for the fiscal year ending June 30, 2007, follows. Requireda. Compute the following performance measures using the Form 990 data presented in this exercise and comment on what information they convey to a...
PLK Co is considering investing in new machinery as part of a launch of a new product, \'Quago\'. The new machine is expected to have a useful life of four years and could be bought for GHS1,000,000, half of which would be paid immediately with the rest payable in a year\'s time. The scrap value of...
2.You have been asked to evaluate an infinitely lived project. The project has a cost of $100. There is no depreciation. The project has sales of $100 per year forever. The operating expenses will be $54 the first year and will increase by 8 percent every year. The corporate tax rate is 30 percent,...
Grand Corporation owns all of the stock of Junior, Ltd., a corporation that has been declared bankrupt and has no net assets. Junior still owes $1 million to Wholesale, Inc., one of its suppliers, and $2.5 million to the IRS for unpaid Federal income taxes. Grand and Junior always have filed...