firstname.lastname@example.org [SMTP:email@example.com] wrote:
> The neutrinos from supernova 1987A had energy 5 to 40 MeV. This is
> about 4 x 10^-5 ergs, or about 10^-7 calories. If this is deposited in a
> cell of size about 10 microns, the cell volume will be about 10^-9 cm^3.
> Depositing 10^-7 calories in 10^-9 g of water will raise its temperature
> by 100 degrees Celcius.
According to my usual on-line reference (http://calc.entisoft.com/scripts/UnitsCGI.Exe), the correct conversion here is 1 erg = 2.39 x 10^-8 calorie, not 10^-2. That gives you a temperature change of only 0.0001 degrees C.
Billy Brown, MCSE+I