0
Still curious? Ask our experts.
Chat with our AI personalities
Rafa
Vivi
JudyWhen a current passes through a metallic wire, the flow of electrons encounters resistance from the lattice structure of the metal. This resistance causes collisions between electrons and lattice ions, which in turn generates heat. The heat generated by these collisions raises the temperature of the wire.
Add your answer:
Earn +20 pts
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 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.
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.
