if gravity pulls down ,why does heat rise?

Answer 1

It's not heat that rises, it's hot substances. Heat itself has no mass and does not care where the gravity is pointing. However, the density of substances will vary with temperature. Most substances have a decrease in density as the temperature of that substance rises.

This is why it appears as if heat rises from a fire or your stove. The heat you feel is actually hot air that rises due to the force caused by bouyancy. This bouyancy is a result of the fact that warm air is less dense than cold air.

Answer 2

Do you mean to ask: Why does heated air rise against gravity?

Hot air has a lower density than that of the cooler air in the atmosphere above it, and, therefore, is buoyant and rises.

But heat by itself does not rise. It radiates from it's source toward the absence of heat: cold.

Answer 3

- Gravity Does No artwork - artwork is the circulate of power between systems. while an merchandise strikes in a gravitational field, the proportions of kinetic and ability power replace, however the great power (E = U + ok) keeps to be an identical. - clarification for Gravity - i don't understand, and that i'm not vulnerable to take a position, yet i will say that i'm rather confident it exists.

Answer 4

Bodies of matter (mass) attract. Heat isn't matter, it's just a property of it.

In general when you heat something, it expands. Since the same quantity of matter now occupies more volume, it is less dense. Less dense, less mass, (per unit volume,) so there's a greater gravitational attraction between the cooler, denser mass and the Earth (which is defining our "down" direction here.)

Answer 5

because hot air is less dense than cold air, so gravity pulls on the cold air more. hot air therefore rises above the cooler air. this is why we have wind ;)

Answer 6

Gravity acts more on the mutual attractions for each other,

Answer 7

HEAT HAS LITTLE MASS BECAUSE THE MOLICULES ARE MORE SPREAD