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When a convection current detector comes near a heat source, it will detect the movement of air or fluid caused by the temperature difference. This movement creates a convection current around the heat source, which the detector can measure to indicate the presence and intensity of the heat source.
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What happen when the convection current detector came near a heat source using spiral over candle pliers hanger and paper?
When the convection current detector comes near a heat source like a candle, the heated air rises due to convection, causing the paper spiral to move or spin. This movement is a result of the hot air near the heat source displacing the cooler surrounding air, creating a convection current that affects the paper spiral's position.
Define and give an example of convection?
Convection is the transfer of heat through a fluid (liquid or gas) by the movement of the fluid itself. An example of convection is when warm air rises near a heat source, such as a radiator, cools down as it moves away, and then sinks back to be heated again, creating a convection current.
Why cant convection happen in solids?
Convection is the transfer of heat via the movement of warmer material nearest a source of heat toward colder regions, while colder material moves toward the heat source. Usually, the warmer material moves upward from the heat source (since "heat rises") and then is pushed outward toward colder regions, setting up a circulating current that pushes the colder material sinks downward and toward the heat source. Unlike conduction (where heat is transferred by direct contact with the heat source) or radiation (where the heat source sends out waves of heat), convection requires a circulating "current" -- where material moves or flows within a fluid, such as a liquid or gas. This flow is not possible within a solid -- where the material inside cannot move from place to place. Convection cannot occur in a vacuum, either, since there is no material to flow from one place to another.
Does it matter if aluminum absorbers are near a Geiger-Muller detector when you have a radioactive source of beta particles?
It does if you want to detect the beta radiation. Beta radiation, beta particles, can be stopped with a sheet of aluminum foil. An aluminum "absorber" would act as a shield to the Geiger-Müller (GM) detector and stop the beta radiation, which is really high energy electrons or possibly positrons. Placing a shield between the source of the beta radiation and the GM detector would block the radiation, thus shielding the detector from it. The detector would be "blind" to the radiation. Note that this would be effective if all you wanted to do was look at gamma rays. The gamma rays and the beta radiation would leave the source and head to the GM detector, the beta particles would be blocked by the aluminum, and only the gamma rays would make it to the GM tube to be counted. Links can be found below.
What three things play a role in convection?
Temperature difference, density variation, and gravity are the three main factors that play a role in convection. Temperature difference heats up the fluid, causing it to expand and become less dense. This creates a density difference, which, when combined with gravity, leads to the circulation of the fluid in a convection current.
What happen when the convection current detector came near a heat source using spiral over candle pliers hanger and paper?
When the convection current detector comes near a heat source like a candle, the heated air rises due to convection, causing the paper spiral to move or spin. This movement is a result of the hot air near the heat source displacing the cooler surrounding air, creating a convection current that affects the paper spiral's position.
What is the heat source driving the convection current in earth's mantle?
Radioactive decay - mainly of potassium.
Is the heat source for the convection current in the mantle in the sun?
The difference in temperature and density is the cause of convection currents in the earths mantle. Convection currents are the flow that transfers heat within a fluid.
Is there warmer air in a convection current?
A convection current in air will have warmer air near to the heat source and this will rise. Then it gradually loses heat to the surroundings and sinks again, so there is warmer air in parts of the current and cooler air in other parts.
What way does air move in a convection current?
In a convection current, air molecules near a heat source become energized and rise due to lower density. As these molecules cool, they become denser and sink back down, creating a circular motion of air flow known as a convection current.
What is the heat source that drives convection current Inside earth?
The heat source that drives convection currents inside the Earth is primarily from the decay of radioactive elements within the Earth's core. This heat causes the material in the mantle to become less dense and rise, creating convection currents that drive the movement of tectonic plates.
Water being heated in a pan circulates because of?
convection - as the water near the heat source gets warmer, it becomes less dense and rises, creating a current that circulates the water in the pan.
What does americium do in smoke detectors?
Americium-241 is used in smoke detectors because it emits alpha particles that ionize the air inside the detector. This ionization process allows a small electric current to flow between two electrodes in the detector. When smoke enters the detector, it disrupts this current, triggering the alarm.
The heat source for the convection current in the mantle is the su?
The heat source for the convection currents in the mantle is primarily the heat leftover from Earth's formation and the heat produced by radioactive decay of elements within the mantle. The heat from the Sun does not directly drive mantle convection, although it does play a role in surface processes like weather and climate.
Why the Americium is used in smoke detectors?
In the smoke detector, the fast - moving alpha particles enable the air to conduct an electric current. As long as the electric current is flowing, the smoke detector is silent. The alarm is triggered when the flow of electric current is interrupted by smoke entering the detector.
Define and give an example of convection?
Convection is the transfer of heat through a fluid (liquid or gas) by the movement of the fluid itself. An example of convection is when warm air rises near a heat source, such as a radiator, cools down as it moves away, and then sinks back to be heated again, creating a convection current.
During convection hot material do what?
During convection, hot material rises due to its lower density, creating a current that transfers heat from the hot material to cooler material. This process then causes the cooler material to sink and cycle back towards the heat source, creating a continuous convection current.
