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.
Taking off is one of the main times albatrosses use flapping to fly, and is the most energetically d
Two main types of nerve cells.
To measure fuel-injector resistance, a technician constructed a short wiring harness with a double ...
A leak detection pump (LDP) used on some Chrysler vehicles to pressurize (slightly) the fuel ...
The Olestra study followed a sequence of steps
For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately