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1. When the 9536Kr nucleus undergoes beta decay, how many protons and neutrons does the daughter nucleus (Rb) contain?
2. The half-life of radium-224 is about 3.6 d. What approximate fraction of a sample remains undecayed after two weeks?
3. How many protons and neutrons does a neutral atom designated as 4018X contain?
4. A drug tagged with 9943Tc (half-life = 6.05 h) is prepared for a patient. If the original activity of the sample was 2.0 x 104 Bq, what is its activity (R) after it has been on the shelf for 1.6 h?
Energy level to second order in the perturbation.
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A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.22 m/s relative to the ground. How fast is the train moving
A 1 kg physics book lying on a 20 degree incline isattached to a 500g coffee cup. How far does the book slide
A drug prepared for a patient is tagged with 9943Tc which has a half-life of 6.05 h. What is its activity at the time it is injected
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