In the net reaction, Eq. 31–7, for the proton–proton chain in the Sun, the neutrinos escape from the Sun with energy of about 0.5 MeV. The remaining energy, 26.2 MeV, is available to heat the Sun. Use this value to calculate the “heat of combustion” per kilogram of hydrogen fuel and compare it to the heat of combustion of coal, about 3 x107 J/kg.
IClicker question We have a negative charge q=-e. How electric field is directed at point X q=-e (negative charge) X A: B: C: D: E: E=0 1 q=-e (negative charge) F X E A: Place positive charge q0 Force E=F/q0 2 Recall: The Electric Field A charge creates an electric field around itself and the other charge feels that field. +