Answer to Question 1
Hydrogen.
Answer to Question 2
Once the usable hydrogen fuel is all burned up, there remains a helium-rich core. Once fusion is finished in the star's core, there is insufficient pressure to prevent collapse due to gravity, and the contraction generates a huge increase in internal temperature, triggering a higher level of hydrogen fusion in the star's shell. The outer shell expands from the heat of accelerated fusion, but this expansion simultaneously cools the star's surface, yielding a large, cool star.
An electrocardiogram (EKG) wave, a record of the electrical signal as it moves through the conductio
Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation.
The Spectra of Stars with Different Surface Temperatures.
A flex-fuel vehicle often has a yellow gas cap, which is labeled “E85/gasoline”.
A central port fuel-injection system.
To check to see if the electric fuel pump can be operated from the relay contacts, use a fused ...