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When particles with more energy move upwards from a hotter place to a colder one is it conduction convection or radiation?
Wiki User
∙ 6y ago
is it conduction, convection or radiation
Wiki User
∙ 6y ago
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Compare Convection and conduction?
Convection and conduction are both means of heat transfer involving materials.Convection usually occurs in liquids and gases. Heated parts of these materials expand and become less dense. Pressure from the cooler, less light parts (due to gravity) pushes the lighter heated parts upwards. Near the surface , these cool, sink and circulate upwards again when heated.Conduction can occur in all substances but most efficiently in solids like metals where the particles are close together. If the particles in one part vibrate more when heated to a higher temperature, this vibration is passed along through the material. Conduction can occur in any direction but always from the hottest towards the coolest parts.
What is the similarties between conduction and convection?
If you are talking about heat transfer, these are both methods. Conduction is when something is touching a heat source, and so it starts to heat up. Convection is when heat travels upwards because it is lighter than cool air. I guess the similarity is they are both methods of heat transfer.
Why can't we keep our hand above a candle flame?
Heat is transmitted through conduction (touch), convection (flowing) and radiation (rays). When you hold your hand beside a flame the radiated heat will reach you (it radiates out in all directions like the light), but not much of the convected heat, because convected heat flow is upwards (most things expand as they heat up, so they get lighter and rise), and you will not get heat from conduction unless a burning spark flies out and touches you and conducts the heat directly. With your hand above the flame you are receiving heat from radiation and convection. With your hand in the flame you would get heat from radiation and convection and conduction. The hottest part of a flame is the position where most intense combustion is occurring. If you look at a flame there is usually a small more transparent area near the base of the flame. The boundary between this and the bright area above at the centre of the flame is the hottest area. (This is why when using a gas welder you focus this part of the flame on the metal area to be welded.)
How does convection occur in an oven?
Air gets hot and it moves upwards in relation to the air that is not as hot
How is convection alike in liquids and gases?
Convection in alike in both liquids and gases as, in both of them, the heated molecules being lighter rise upwards and the cooler molecules take their place.
Compare Convection and conduction?
Convection and conduction are both means of heat transfer involving materials.Convection usually occurs in liquids and gases. Heated parts of these materials expand and become less dense. Pressure from the cooler, less light parts (due to gravity) pushes the lighter heated parts upwards. Near the surface , these cool, sink and circulate upwards again when heated.Conduction can occur in all substances but most efficiently in solids like metals where the particles are close together. If the particles in one part vibrate more when heated to a higher temperature, this vibration is passed along through the material. Conduction can occur in any direction but always from the hottest towards the coolest parts.
What is the method by which heat is transferred into in a fluid liquid or gas?
Transfer of heat in nature occurs through three ways: conduction, convection and radiation. Conduction takes place in solids. Convection in liquids and gases. Radiation takes place in all three media as well as in vaccum.
What is the similarties between conduction and convection?
If you are talking about heat transfer, these are both methods. Conduction is when something is touching a heat source, and so it starts to heat up. Convection is when heat travels upwards because it is lighter than cool air. I guess the similarity is they are both methods of heat transfer.
What is the main process that transfers heat upwards into the chimney?
Convection.
What forms when warm air is forced upwards expands and cools?
It is called a convection cell.
What direction do convection currents move?
Warmer material in a convection current rises upwards.
What is Convection Currents?
Convection current is the flow of hot fluid in a circular pattern. A convection current is a form of transfer of energy. It occurs mainly in liquids, but it can also occur in gases. In a convection current, the particles with greater energy (the particles that are hotter) rise because they become less dense. As they rise, particles with less energy (cooler particles) rush in to replace the particles that rose as they are more dense. You can see this happening with sea and land breezes.
Why can't we keep our hand above a candle flame?
Heat is transmitted through conduction (touch), convection (flowing) and radiation (rays). When you hold your hand beside a flame the radiated heat will reach you (it radiates out in all directions like the light), but not much of the convected heat, because convected heat flow is upwards (most things expand as they heat up, so they get lighter and rise), and you will not get heat from conduction unless a burning spark flies out and touches you and conducts the heat directly. With your hand above the flame you are receiving heat from radiation and convection. With your hand in the flame you would get heat from radiation and convection and conduction. The hottest part of a flame is the position where most intense combustion is occurring. If you look at a flame there is usually a small more transparent area near the base of the flame. The boundary between this and the bright area above at the centre of the flame is the hottest area. (This is why when using a gas welder you focus this part of the flame on the metal area to be welded.)
What does convection air have to deal with density?
Hot air has less density and will therefore move upwards.
How does convection occur in an oven?
Air gets hot and it moves upwards in relation to the air that is not as hot
How is convection alike in liquids and gases?
Convection in alike in both liquids and gases as, in both of them, the heated molecules being lighter rise upwards and the cooler molecules take their place.
Can heat energy travel through space a vacuum by convection?
Actually heat cannot travel through vacuum. sun emits radiations (obviously electromagnetic radiations.) which needs no medium to travel. hence these radiations travel through space and reaches earth where it interacts with atmosphere. when these radiations fall on media like air, water land etc. the radiation is converted into heat energy. Thus it is clear that heat from sun is converted into radiations which travel through space and reaches earth where it is converted to light.
