Part A: After you strike a match, the hot gases in the flame soon disperse. The

Question

Part A:

After you strike a match, the hot gases in the flame soon disperse. The Sun and stars also consist of hot gases why do they not disperse also? How long would the Sun burn if it used chemical energy like a match?

Part B:

How long does it take electromagnetic radiation emitted at the Sun's center to reach the surface? How long does it take radiation to travel the same distance in free space? Explain clearly why the two times differ by a very large factor. (the velocity of light is 3000,000 km/sec. the radius of the Sun is 400,000 km)

Explanation / Answer

A ) The gases disperse because the the attraction force of the match is not enough to hold the gases in the surface. Whereas the gravitational force of sun is large enough o not let the gases disperse

b) Velocity of light in free space = 3*0^8 m/s , the same speed in the core of sun will be quite less since the medium is dense hence there will be a uge time difference

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