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Heated matter tends to rise because it is less dense than cooler matter. This is due to the fact that warmer air molecules have more energy, and thus tend to move around and spread out. Cooler air does not move around so much, having less energy, and therefore will be more closely packed, or more dense. Because of this higher density, it will sink through the more loosely-spaced warm air particles and displace them. This results in warm air rising above cooler air.
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Why does water heat up quickly if the heat is applied from the bottom?
Heat goes up
How does a fire demonstrate all 3 forms of heat transfer?
Convection - hot air raises -- smoke and other hot air goes up. Conduction - anything in contact with the fire - a pot, a poker, etc conducts the heat Radiation - some of the energy ( heat) is released as infrared (heat) waves you can feel the heat without touching the fire thru radiation of these i-r waves.
Describe the energy transformation as the engines piston goes up and down?
When the piston goes up the heat temperature decreases while when the piston is down the heat temperature is increases.
Why do different materials heat up at different rate?
usually metals or conductors get the heat energy from the heat. the heat transfer the particles in the conductors which causes it to heat up in a faster rate to get it hot.
Will the pavement or grass heat up faster on a hot day?
Pavement.
What if the heat source in a hot air balloon goes out?
what goes up, goes down!
How does heat move from inside earth to earths surface?
well hot goes up and cold goes down
What causes hot air to rise?
Hot air is lighter than cold air, so it rises up. Ex. A hot air balloon rises up because we heat the air and it goes up.
Why temperature goes up oil pressure goes down?
Heat reduces the viscosity. 5w-20 is 5 when cold-20 when hot. Lower no. is thicker.
Why a hot air balloon floats?
a hot air balloon floats because of convection which means that the heat that is from the flame goes up than back down than replaces it with cooler air it goes in a cycle.
Does heat flow up or down?
Up. Heat goes up.
What goes hot to cold cold to hot?
fire to ice ice to fire
What goes cold and then goes hot?
hot on the 19th od April
Why does water heat up quickly if the heat is applied from the bottom?
Heat goes up
How does a coal fire help to ventilate a room as well as heat it?
Some of the heat from the fire goes up the flue as hot air. This creates a draught, pulling fresh air into the room.
Which way does heat flow?
Heat flows from hot to cold. This is because molecules spread around and it goes from hot to cold until thermal equilibrium is reached.
What is bench heat and how does the particle movement make the secret work?
bench heat is convection and the secret works cause it goes from hot to cold, travelling in acontinuous cycle, heating 'whatever' up
