Question 1
In the Lawson number what do the
n and

stand for?
◦
ion density, critical ignition temperature
◦
ion density, confinement time
◦
neutrino density, confinement time
◦
ion density, critical ignition temperature
◦
neutrino density, reaction mean life
Question 2
Radiant energy reaching the Earth from the sun is not sufficient to keep the Earth's surface temperature comfortable for life. Of the following, the most likely source of the additional thermal energy is from
◦
fusion of hydrogen nuclei in the Earth's core.
◦
fusion of high Z nuclei in the Earth's core.
◦
fission of radioactive nuclei inside the Earth.
◦
fission of radioactive nuclei in cosmic rays.
◦
deflection of radioactive nuclei in cosmic rays.