A supernova explosion of a kg star produces J of energy.
How many kilograms of mass are converted to energy in the explosion?
What is the ratio of mass destroyed to the original mass of the star?
The electrical power output of a large nuclear reactor facility is 900 MW. It has a efficiency in converting heat released by nuclear reactions to electrical energy.
What is the thermal power output?
How many nuclei undergo fission each second, assuming that the average energy released per fission is 200 MeV?
What mass of is fissioned in 1 year of full-power operation?
The power output of the Sun is W. of the Sun’s energy output is supplied by proton-proton chain reactions.
If a proton-proton chain reaction produces 26.7 MeV from the fusion of four protons into a helium nucleus, how many protons are consumed per second?
If a proton-proton chain reaction produces two neutrinos, how many neutrinos per second should there be per square meter at the surface of Earth from this process?