Which of the following statements is true of stars?
A) They die when they exhaust their fuel, allowing gravity to take control.
B) The energy generated through nuclear fusion keeps their interiors cool.
C) They avoid collapsing by balancing gravity through low pressures.
D) The generation of energy from nuclear fusion prevents stars from resisting their own gravity.
Question 2
A__________is a supernova explosion caused by the collapse of a massive star.
A) type II supernova
B) type I supernova
C) type Ia supernova
D) type III supernova
Fuel Injector
A technician-made adapter used to test exhaust system back pressure.
To prevent ignition and fuel-injection operation while the engine is being cranked, remove both the ...
A typical peak-and-hold fuel-injector waveform. Most fuel injectors that measure less than 6 ohms ...
Exhaust emissions are very complex. When the air–fuel mixture becomes richer, some exhaust ...
Fossil Fuel Emissions