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CBSE Class 12-science Answered

Q) Calculate the half-life period of a radioactive substance if it's activity drops to 1/16th of it's initial value in 30 years.
Asked by Ibrahim Mohammed | 18 Feb, 2016, 11:56: AM
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Answered by Yashvanti Jain | 18 Feb, 2016, 02:57: PM

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CBSE 12-science - Physics
solve
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Asked by rohandhawaniya17112006 | 06 Mar, 2024, 03:32: PM
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CBSE 12-science - Physics
nuclei
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Asked by murshidibrahimkk | 08 Feb, 2024, 10:28: AM
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CBSE 12-science - Physics
. 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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Asked by kailasks2007 | 28 Dec, 2023, 08:14: PM
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CBSE 12-science - Physics
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.
Asked by varma.renu9481 | 06 Mar, 2023, 05:44: PM
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CBSE 12-science - Physics
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?
Asked by arjunsah797 | 16 May, 2022, 02:17: PM
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CBSE 12-science - Physics
the atomic masses of two different nuclei are 3 and 81 then the ratio of their radius r
Asked by akashjyani705 | 06 Mar, 2022, 04:39: PM
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CBSE 12-science - Physics
WHAT ARE ISOTONES AND ISOTOPES CORRECT DEFINITION?
Asked by sharonashoksp | 27 Jun, 2021, 02:44: PM
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CBSE 12-science - Physics
Nuclear density of hydrogen is 2.3x1017 kg/m3. Given A = 56 for iron, find its nuclear density
Asked by gaurish6247 | 07 Apr, 2021, 05:16: PM
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CBSE 12-science - Physics
how are we supposed to solve this question
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Asked by merinlijo_20002 | 17 Jun, 2020, 10:05: AM
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CBSE 12-science - Physics
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.
Asked by rajubarman | 01 Dec, 2019, 10:03: AM
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