An unlit match is held near ( not touching) to an extremely hot bunsen flame. The match does NOT get hot enough to light because
a. the flame is not hot enough b. air is a bad conductor of heat
c. the match head reflects radiation d. the flame does not radiate any heat sideways.

what is the ans ?? :S

Question

An unlit match is held near  ( not touching) to an extremely hot bunsen flame. The match does NOT get hot enough to light because
	a.   the flame is not hot enough		b.   air is a bad conductor of heat
	c.   the match head reflects radiation	d.   the flame does not radiate any heat sideways.

what is the ans ?? :S

nikita2 · Answer

i think it is b

anonymous · Answer

A and B are correct, though if there is only one answer it'd be B.

anonymous · Answer

I agree with the others. I think 'B' is the answer because the atoms in it are too far apart for the heat to travel through by means of convection/radiation. Don't quote me on the explanation but I'm almost certain that B is the answer. Hope this helped :)

anonymous · Answer

Im pretty sure about B as well.

anonymous · Answer

a and b are both correct, but d is close. A burner like that radiates very little heat sideways, in fact you can hold a finger very close to the side of it without being burned. If the burner radiated more heat laterally, if the flame was hot enough or if air was an arbitrarily better conductor of heat, the match would light. The only one an argument can't be made for is (c), and (d) is technically wrong due to the word "any"

anonymous · Answer

thanks