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Why does a spiral rotate when suspended over a lighted candle?
This rotation is caused by convection currents, where the heat from the candle rises and creates a flow of hot air around the spiral. The heated air rises, cools down, then sinks, creating a circular motion that causes the spiral to rotate.
Does the heat go up or down in a convection current?
In a convection current, heat rises.
What is the transfer of heat when warm material rises and cold sinks?
This process is known as convection. Warm material rises because it is less dense than cold material, creating a convection current. As the warm material rises and the cold material sinks, heat is transferred through the movement of the material.
How is the energy transferred from the cooker to the liquid in the saucepan?
Energy is transferred from the cooker to the liquid in the saucepan through conduction, where heat is transmitted from the hot surface of the cooker to the bottom of the saucepan by direct contact. This heat is then transferred to the liquid through convection, as the hot liquid rises and circulates, creating a convection current that heats the entire volume of liquid.
How does convection current occur when part of a fluid is heated?
When part of a fluid is heated, it becomes less dense and rises, creating a convection current. As it rises, it displaces cooler, denser fluid, which then descends to replace the rising fluid. This continuous circulation results in a convection current within the fluid.
Why does a spiral rotate when suspended over a lighted candle?
This rotation is caused by convection currents, where the heat from the candle rises and creates a flow of hot air around the spiral. The heated air rises, cools down, then sinks, creating a circular motion that causes the spiral to rotate.
When the heated part of the mantle rises through the cooler part is an example of what?
A rising convection current.
What river is the most important in Europe it rises in Germany and passes along or through six other countries on its way to the black sea?
The Danube
Does resistance of heater coil remains same when current flows through it?
Typically resistance rises with temperature.
Does the resistance of heater coil remains same when current flows through it?
Typically resistance rises with temperature.
The what river is perhaps Europe's most important river it rises in Germany and passes along or through six other countries on its way to the Black Sea?
danube
What is the opening at the surface of the earth through which volcanic material passes?
The opening at the surface of the Earth through which volcanic material passes is called a vent. Vents can vary in size and shape, and they are typically found at the top of a volcano or along a fissure during an eruption. Magma rises through the vent and erupts onto the surface as lava, ash, and gas.
Does the heat go up or down in a convection current?
In a convection current, heat rises.
What kind of current is convection?
heat rises and cold desends
What is the transfer of heat when warm material rises and cold sinks?
This process is known as convection. Warm material rises because it is less dense than cold material, creating a convection current. As the warm material rises and the cold material sinks, heat is transferred through the movement of the material.
When the heated part of the mantle rises through the cooler parts this an example of?
Convection
What do filaments do inside a light bulb?
It passes an electric current and its temperature rises to about 3000 degrees C so that it is white-hot and gives off light. Unfortunately this type of bulb also produces a lot of heat, which is just wasted power.
