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How does heat transfer by convection by a gas flame to potatoes with a skewer in?
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Why if your hand is held high above a burning candle does it feel heat?
Air near the flame is heated and rises, thus reaching your hand. This is heat transfer by convection.
What is the relationships of radation conduction and convection?
radiation is heat transfer through light (both visible and not). with a nuclear bomb, surrounding distant flammeables combust because of irradiated infrared energy. conduction is heat transfer through direct contact. a pot on the stove gets heated by the flame that touches it. convection is heat transfer through a medium (really really slow).
When does convection take place in everyday life?
Convection as a form of heat transfer occurs whenever something is hotter than the air around it. An example might be a stove-top that has been turned on or asphalt in the sun.
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 kind of heat transfer is a marshmallow over a bonfire?
A marshmallow over a bonfire is a radiant heat transfer. The marshmallows are not in direct contact with the flame but are held very close to reduce burning.
Why if your hand is held high above a burning candle does it feel heat?
Air near the flame is heated and rises, thus reaching your hand. This is heat transfer by convection.
Where does conduction radiation and convection occure?
Condction-- In the Iron Box or Kettle from flame to Pot bottom Convection-- Airconditioning the room .Cooling takes place by movement of the cooler particles. Radiation-- From Sun transfer of heat. Or from a Bonfire in cols places.
What is the relationships of radation conduction and convection?
radiation is heat transfer through light (both visible and not). with a nuclear bomb, surrounding distant flammeables combust because of irradiated infrared energy. conduction is heat transfer through direct contact. a pot on the stove gets heated by the flame that touches it. convection is heat transfer through a medium (really really slow).
What is the flame test for oxygen?
A smouldering piece of wood (like a bamboo skewer) will reignite in the presence of pure oxygen.
How can you describe roasting a hot dog but not using roast hot dog fire stick?
You put a wiener on a skewer and heat it evenly over a flame??
When does convection take place in everyday life?
Convection as a form of heat transfer occurs whenever something is hotter than the air around it. An example might be a stove-top that has been turned on or asphalt in the sun.
How do you spell shishkabobs?
The variant spelling "shish-kabob" refers to the skewer food "shish kebab."
What is convection central heating?
Convection is a way to transfer heat. When something is heated, by flame, for example, the air right above the flame will expand [as substances expand when heated]. This expansion will cause it to have a greater volume. The air will have the same mass, so its density will decrease as density is mass over volume. Because its density decreases, it will rise. Once risen, it will do the opposite: lose the energy by cooling, decrease in volume, increasing the density, and fall back down.
How does a hot object cools down after sometime when removed from the flame explain?
The heat is lost by radiation and convection.
Why do gas ovens have the flame at the bottom?
Heat from the flame rises. The stuff below the flame would not be heated. The flame draws combustion air from beneath, by convection. Anything below the flame gets cooled. It's why one puts the kindling paper and wood shavings below the fireplace logs.
Witch Pokemon has a flame body?
The Pokemon that has the POKE POWER flame body is Magmar which you can get either from Pokemon platinum or by transfer from Pokemon fire red
Is a pan over a flame radiation or conduction?
Both the flame heating the pan and the pan heating the water are examples of conduction. Convection is when the molecules of water heat other molecules of water.
