Thursday, March 29, 2012

7.17 and 7.18


A fuel that doesn’t burn.  What is it?

Answers

·         Uranium.  When Uranium atoms split into two (fission) they release energy which can be captured in a nuclear power station.  This is a nuclear reaction and is fundamentally different to burning (combustion is a chemical reaction)

7.17 and 7.18 starter 2
13 January 2012
14:02

How many protons and neutrons are there in

·         23592U?
·         23692U?

Answers

·         23592U = 92 protons; 143 neutrons.

This radioisotope of Uranium is commonly used as a fuel for nuclear power stations

·         23692U = 92 protons; 144 neutrons

This radioisotope of Uranium is highly unstable and is artificially created in nuclear power stations where it undergoes fission

7.17 and 7.18
12 January 2012
10:32
·         7.17 understand that a nucleus of U-235 can be split (the process of fission) by collision with a neutron, and that this process releases energy in the form of kinetic energy of the fission products
·         7.18 recall that the fission of U-235 produces two daughter nuclei and a small number of neutrons
<<Nuclear Fission.pptm>>
<<U235 fission animation.swf>>

PhET animation - nuclear fission
31 January 2012
13:34
<<nuclear-fission_en.jar>>
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U235 fission animation.swf Download this file

Nuclear Fission.pptm Download this file

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