Question

Answers for questions 13-23 please.

The following question is about the fundamental forces 13. List the four force interactions in the universe (in order from strongest to weakest) together with their associated particles The decay curve of a radioactive nuclide sample is shown. Its initial activity is measured to be X 6q 14. What is the population at t8.0 hours?14. 15. After how many half lives will the 0 population be 125 nuclides? 15. 16. What will be the level of activity (in terms of x) after two half lives have elapsed? 16 17. 17. What would the activity of the above sample be if we tripled its size? 18. If the initial activity of 0.365 grams of the above sample is Y Bq, what would the activity be if we increased the initial sample to 0.950 grams? 18. A radioactive nuclide X having a mass of 65.0 grams is sealed in a container having a mass of 5.00 grams. The nuclide X decays into the nuclide Y. The nuclide X has a half life of 6.00 hours 19. What will the mass of nuclide X be after 24 hours have elapsed? 19. 20. What will the mass of nuclide Y be after 24 hours have elapsed? 20. 21. What will the mass of the sealed container be after 24 hours have elapsed? 21. These questions are about radioactive half-life. 22. 256 grams of a radioactive sample decays to 4 grams in 120 minutes. What is the half life of the sample? 22. 23. Suppose the activity of a radioactive sample decreases from X Bq to X/16 Bq in 80 minutes. What is the half-life of the substance? 23.

Answer 1

13

Nuclear Force, Electromagnetic force,Weak force and Gravitational force.

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