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One would need a fluid (water, air or the like) and something to drive currents within it. Here's the skinny right from our friends at Wikipedia: "Convection in the most general terms refers to the movement of currents within fluids (i.e. liquids, gases, and rheids)." Jumping off from there, let's look at an example of a heat transfer possibility. When we use the oven, the kitchen gets warm. There is a bit of thermal radiation, but skip that and just check the convection side. Air (a fluid) is against the outside of the oven door. As heat from the door is transferred to the air, it becomes less dense than the air around it, and it rises. Some "new" cooler air takes its place and the process continues. A convection current has spontaneously arisen. The process of heat transfer drives the convection cycle; it sets up those currents in the air around the oven. Soon the kitchen is warmer than it used to be.
What else can I help you with?
What is a substance that carries electricity under certain circumstances but not under other circumstances called?
A substance that carries electricity under certain circumstances but not under others is called a semiconductor.
In which layer of the sun does granulation occur?
Granulation occurs in the photosphere, which is the visible surface of the Sun. It is characterized by the pattern of rising and falling material due to convective currents in the outer layer of the Sun.
What states of matter does convection occur in?
Under conditions of standard temperature and pressure convection is not possible in the solid state of matter.However under extreme conditions (e.g. the high temperature and pressure in the earth's mantle) convection is not only possible in the solid state of matter, but happens all the time just as in the liquid and gas states of matter but much slower.
What is a substance that enables a chemical reaction to proceed under different conditions?
A catalyst is a substance that enables a chemical reaction to proceed under different conditions. It lowers the activation energy required for the reaction to occur, allowing it to happen more quickly or at a lower temperature or pressure. The catalyst itself remains unchanged in the reaction and can be reused multiple times.
Why do you drink radioactive substance?
Drinking radioactive substances can be extremely harmful and cause serious health issues, including radiation sickness, organ damage, and even cancer. It is not safe or recommended to consume radioactive materials under any circumstances.
What is a substance that carries electricity under circumstances but not under other circumstances is called?
A substance that carries electricity under certain circumstances but not under others is called a semiconductor.
What is a substance called that carries electricity under certain circumstances but not under other circumstances?
A substance that carries electricity under certain circumstances but not under others is called a semiconductor.
What is a substance that carries electricity under certain circumstances but not under other circumstances called?
A substance that carries electricity under certain circumstances but not under others is called a semiconductor.
What is a substance that carries electricity under certain circumstances but not under other circumstances?
A substance that carries electricity under certain circumstances but not under others is called a semiconductor.
Under which circumstances might the reduction of blood flow to the kidneys occur?
During masturbation.
What is it called when a substance under goes a chemical change?
A chemical reaction occur.
How the convection occur in earth's mantle?
convection occurs in the asthenosphere, which is located under the lithosphere. the inner core heats the liquid mantle and it circles and produces plate tectonic activity.
Under what circumstances do mergers and acquisitions occur?
A period of intense technological changes encourages mergers and acquisitions.
In which layer of the sun does granulation occur?
Granulation occurs in the photosphere, which is the visible surface of the Sun. It is characterized by the pattern of rising and falling material due to convective currents in the outer layer of the Sun.
Under what circumstances would evolution not occur if?
Evolution would not occur if there is no genetic variation within a population, no selection pressure, or if there is no reproduction and passing on of genes to the next generation.
Are video games flammable?
If you put any flammable substance on it. Under normal circumstances it should not be flammable because its made of plastic.
Is compressed air legally considered to be a hazardous substance?
Compressed air is not generally considered a hazardous substance under normal circumstances. However, it can pose risks if mishandled, such as causing injury if used improperly or if a container bursts under pressure.
