# Physics graphs

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#1
will post question below
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#2
Any idea what the shape of graph is ?
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9 months ago
#3
For the de Broglie, remember that . Come up with a proportionality for that and see how it changes when you say, half or double . Use a proportionality to get your solution.

For the radioactive isotope decay, you know that , where is some decay constant. describes the number of decays per second of the radioactive isotope to the stable product, in other words,

where I've thrown in self-explanatorily. The negative sign should be obvious- you're losing radioactive isotope. Anyhow, you know that for every radioactive decay, you gain one stable product- can you think of a way to relate to ? Try to put that into the equation above and get an integral going to get .
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