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Can anyone give me a list of about 12 places that heat travels and whether it's by convection conduction or radiation?
1. From the sun to the earth, radiation
2. Heating lamp to you, radiation
3. You touching a hot stove, conduction
4. Heater blowing hot air, convection
5. Why the air heats up during the morning radiation from the ground, which is heated by radiation from the sun.
That's all I could think of on the top of my head.
What else can I help you with?
Is a heater a conduction or convection?
Heater Is neither Conduction nor Convection... The Questions seems to be wrong... If you ask Whether the heat given by a heater is lost by conduction or Convection, then the answer is: YES! In a heater the heat is lost by all three processes namely Conduction , Convection and Radiation.
In is convection the main type of heat transfer?
In convection, heat transfer occurs due to the movement of a fluid (liquid or gas) carrying heat energy from one place to another. While convection is one of the main types of heat transfer, the other two are conduction (direct transfer through a material) and radiation (transfer through electromagnetic waves).
Does infrared travels in streight lines?
All electromagnetic radiation travels in a straight line. The straight line may bend when the radiation crosses the boundary between different media, but it's still straight in each individual medium.
Why does the matter expand when heated?
Heat energy causes all matter to expand, a reason for this strange occurrence is that when a particular substance receives heat whether it be through conduction, convection or radiation the atoms inside the substance become more energised therefor needing more space to move, they push the outside boundaries making the substance expand. If the substance receives an exceeding amount of heat energy it will change states of matter.
What is meant by net radiation?
Net radiation is the difference between incoming solar radiation absorbed by the Earth's surface and outgoing longwave radiation emitted back into space. It represents the overall energy balance at the Earth's surface, determining whether the surface gains or loses heat.
Is a heater a conduction or convection?
Heater Is neither Conduction nor Convection... The Questions seems to be wrong... If you ask Whether the heat given by a heater is lost by conduction or Convection, then the answer is: YES! In a heater the heat is lost by all three processes namely Conduction , Convection and Radiation.
In is convection the main type of heat transfer?
In convection, heat transfer occurs due to the movement of a fluid (liquid or gas) carrying heat energy from one place to another. While convection is one of the main types of heat transfer, the other two are conduction (direct transfer through a material) and radiation (transfer through electromagnetic waves).
Name four factors upon which a substances state depends?
The state of a substance depends on temperature, pressure, molecular structure, and intermolecular forces. These factors determine whether a substance exists as a solid, liquid, or gas at a given time.
What mediums can heat travel through?
Heat can move in three ways: conduction, convection, and radiation. In conduction, physical contact between two surfaces is required. The molecules of the heat source bang into the molecules of the heat sink, imparting some of their energy in the process, thus reducing the temperature of the heat source while increasing that of the heat sink. Heat can move by conduction through pretty much any mass, whether solid, liquid, gas, supercritical fluid, or plasma. In convection, a substance is heated by the heat source and then moved to another location where it can release some of its energy as heat. In the case of natural convection, the motion is a result of buoyancy forces, while in forced convection something like a fan or pump is responsible for moving the heated mass. For heat to travel in this manner the medium must be capable of movement - which generally excludes solids but includes gases, liquids, supercritical fluids, and plasmas. In radiation no medium is required to get the energy between the source and the sink. Heat can travel via radiation through a vacuum.
How does convection differ from convection?
Well it differs in this way. Conduction is when heat is applied to an object and causes mainly the point of contact to be heated. For example lighting a match under a metal rod. It will mainly heat the point of contact, eventually heating the rest of the rod. Additionally, conduction can be referred to when talking about electricity and whether a material can conduct or not. Convection is different as it disperses heat evenly through a liquid. For example, boiling water. A single point of the water is heated, then it rises, allowing colder water from the top to fall, heat, rise and creates a current, evenly heating the water. The same example can be used when referring to preheating an oven. Hopefully this helps. Convection involves the actual movement of fluid materiel, either liquid or gas, usually in a gravitational field where the difference in temperature causes difference in density which in turn causes fluid motion. Conduction can and does occur concurrently with convection, but does not involve the macroscopic movement of materiel. Conduction can occur in gasses or liquids, but also in solids. Conduction occurs when the thermal vibrations of hotter mater are transferred to cooler matter. There is a third method of heat transfer, Radiation. Radiation can occur in all three phases of matter, but can also transfer heat across a vacuum. Usually thermal radiation is in electromagnetic wavelengths too long to be visible, but in some situations like an incandescent bulb or the sun, it can be seen.
What materials cant heat travel through?
Heat travels via three possible mechanisms: conduction, convection, and radiation. Heat can travel by convection through any space containing mass. Some materials are very good insulators and heat can only travel very slowly through them. Heat cannot travel via conduction through a perfect vacuum. Conduction occurs via molecules interacting with each other - usually colliding. Where mass is widely dispersed - such as very low pressure gas - conduction takes a lot longer because collisions occur infrequently. Heat travels by convection when mass at one temperature moves into a region at a different temperature. Simple examples include fans blowing air around and hot air rising from the pavement. Where there is no mass to move around, heat cannot move via convection. Heat can travel via radiation through any medium that permits passage of electromagnetic radiation - so heat travels just fine through a vacuum. Obviously if some mass is interposed that intercepts the radiation, then the heat must either be transmitted through it, reflected by it, or absorbed by it. If it is transmitted, then it can continue on its way as radiation. There are no perfect reflectors but there are some that are pretty good. That's the reason the surfaces of cryogenic vessels and even a lot of thermoses are silvered. If the heat is absorbed by the mass, it will, in turn re-radiate it, albeit probably at a different wavelength than it had when it was absorbed. No matter how you slice it, heat still travels through it, whether vacuum or filled with mass. The one exception is when the gravitational forces are so extreme that no energy can escape. Heat crossing the event horizon of a black hole will not travel through the space where the black hole is sucking everything in - it will just get sucked in with everything else.
Describe whether the comb is charged by conduction or induction?
induction
A man who was sleeping wakes up because he hears the smoke alarm go off in his house Before opening the bedroom door the man feels the door to see whether it is warm He is assuming that heat would?
He is feeling HIS side of the door to detect if the heat from a fire has been CONDUCTED through the door from the OTHER side. The heat on the other side could have come from the fire by way of radiation, convection or conduction.
Can conduction travel through a vacuum?
Conduction occurs between two contacting objects, so whether or not they're in a vacuum is irrelevant.
Name the four factors upon which a substance's state depends?
State of matter can depend on several things. These things include temperature, particle arrangement, motion of particles, and pressure.
When baking inside a relatively dark oven does it make a difference whether a light-colored pan or dark-colored pan is used Dark colors absorb light do they also absorb heat?
It depends whether the heating is primarily by convection or by radiation. A red-hot grill element will cook by radiation mainly, this is radiation in the infra-red region, ie the same as light but a lower frequency, so a dark material will absorb heat more quickly. If the oven is heated by elements that don't get so hot, the heat transfer will be mainly by convection, ie currents of heated air, and it won't matter about the color of the pan, the heating time will depend mainly on how heavy the pan is and its material. Many ovens have fan assisted circulation so in these convection will be more effective and the temperature throughout the oven should be more even.
Does infrared travels in streight lines?
All electromagnetic radiation travels in a straight line. The straight line may bend when the radiation crosses the boundary between different media, but it's still straight in each individual medium.
