Posts Tagged ‘fission’

I have read in multiple sources that the heat produced in the interior of the Earth is the result of "natural radioactivity". Specifically from the decay of Uranium, Thorium, and Potassium isotopes. So my question is this: What other naturally occurring processes are there that convert radioactivity into heat OTHER than fission? Because if fission is the only known process that can do this, isn’t it likely that fission does indeed take place deep inside the Earth? If not the core than perhaps in the lower mantle.

A certain bacteria is capable of reproducing by binary fission once every half hour. Suppose you placed a single bacteria in an enviroment where it would reproduce at this rate. How many bacteria would be present after 3 hours? After 12 hours? What factor might limit how long this rate of reproduction could continue?

I don’t get this question!! Can someone help me!!! ( Thanks)