Heat rises.
Heat flows from hot to cold.
Heat flows from cold to hot.
2007-06-19 12:42:06 · 3 answers · asked by K W 1 in Science & Mathematics ➔ Other - Science
Heat flows from hot to cold. Heat only rises when there are air currents to carry it. Heat causes air molecules to gain kinetic energy and move farther apart. This makes the air less dense so the air under it moves in and makes the heat appear to rise.
One of my students proved this in a science fair project. He had both a normal thermometer and a heat sensor attached to each end of a metal rod. He put the rod in an upright (vertical) position and attached an electric wire to the middle of the rod. The rod acted as a resistor to the electricity and became warm. The temperature of the metal rod was the same at the upper and lower ends. The air temperature at the upper region was warmer than the air temperature at the lower region of the rod. In other words, the heat flowed from the warmer regions of the rod (middle) to the cooler regions (both ends) at the same rate. The air temperature at the top was warmer due to convection currents in the air around the rod.
2007-06-19 12:46:58 · answer #1 · answered by physandchemteach 7 · 0⤊ 0⤋
I think the temperature rises because of the heat.
2007-06-19 12:45:14 · answer #2 · answered by Bob 6 · 0⤊ 0⤋
y?
2007-06-19 12:44:33 · answer #3 · answered by Anonymous · 0⤊ 0⤋