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Topic: kinetic energy change into potential energy  (Read 3010 times)

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Offline Kalpana

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kinetic energy change into potential energy
« on: July 21, 2013, 10:59:23 AM »
1. An element in an atom jumps in such a way that its kinetic energy changes from x to x/4. The change in potential energy will be...
2. What atomic no. of an element X would have to become so that the 4th orbit around X would fit inside its 1st Bohr orbit?
3. What is the separation energy (in ev) for Be3+ in first excited state?
« Last Edit: July 21, 2013, 11:14:13 AM by Kalpana »
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Offline Kalpana

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Threshold frequency
« Reply #1 on: July 21, 2013, 11:20:18 AM »
1 .Threshold frequency of metal is f0. When lighy of frequency v=2f0 is insight on a metal surface maximum velocity of e- emitted is v1 . When frequency of incident radiation is 5f0,maximumvelocity of emitted e- is v2.Find ratio of V1&V2.
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Offline Arkcon

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Re: kinetic energy change into potential energy
« Reply #2 on: July 21, 2013, 12:06:33 PM »
I hope, Kalpana:, that you don't mind my merging and moving your posts.  The topic is a tough one, and they seem related.  Can you start to solve some of these questions on your own?  And show us what you have so far?  That is part of the Forum rules.
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Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.
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