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CBSE Class 12-science Answered

how does a carbon-18 work?
Asked by harshit mehrotra | 28 Feb, 2011, 12:00: AM
answered-by-expert Expert Answer
Dear student,
 
kindly be more descriptive in the questions. Kindly rephrase the question and send us back.
 
Thanking you
Team
Topperlearning.com
Answered by | 28 Feb, 2011, 08:26: AM

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CBSE 12-science - Physics
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. A nucleus of mass number 240 and having binding energy/nucleon 7.6 MeV splits into two fragments Y, Z of mass numbers 110 and 130 respectively. If the binding energy/nucleon of Y, Z is equal to 8.5 MeV each, calculate the energy released in the nuclear reaction.
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Please answer this question. Draw a graph showing the variation of binding energy per nucleon as a function of mass number A. The binding energy per nucleon for heavy nuclei (A > 170) decreases with the increase in mass number. Explain.
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55Cs124(Z=55,A=124) has a half life of 30.8s. (a) If we have 7.8 microgram initially, how many nuclei are presents? How many are present 2 min later? (b) What is the activity at this time? (c) After how much time will the activity drop to less than about 1 per second?
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the atomic masses of two different nuclei are 3 and 81 then the ratio of their radius r
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Carbon-14(C14) decays at a constant rate in such a way that it reduces to 50% in 5568 years. Find the age of an old wooden piece in which the carbon is only 25% of the original.
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