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What is the difference between conduction and convection in terms of the atoms and molecules in a substance?
Copy, paste this web address to see pictures of each type of energy transfer!!
http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
Convection is the transfer of heat by the actual movement of the warmed matter. Heat leaves the coffee cup as the currents of steam and air rise. Convection is the transfer of heat energy in a gas or liquid by movement of currents. (It can also happen is some solids, like sand.) The heat moves with the fluid. Consider this: convection is responsible for making macaroni rise and fall in a pot of heated water. The warmer portions of the water are less dense and therefore, they rise. Meanwhile, the cooler portions of the water fall because they are denser
Conduction is the transfer of energy through matter from particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance. For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon. Conduction is most effective in solids-but it can happen in fluids. Fun fact: Have you ever noticed that metals tend to feel cold? Believe it or not, they are not colder! They only feel colder because they conduct heat away from your hand. You perceive the heat that is leaving your hand as cold.
Radiation: Electromagnetic waves that directly transport ENERGY through space. Sunlight is a form of radiation that is radiated through space to our planet without the aid of fluids or solids. The energy travels through nothingness! Just think of it! The sun transfers heat through 93 million miles of space. Because there are no solids (like a huge spoon) touching the sun and our planet, conduction is not responsible for bringing heat to Earth. Since there are no fluids (like air and water) in space, convection is not responsible for transferring the heat. Thus, radiation brings heat to our planet.
http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
Copy, paste this web address to see pictures of each type of energy transfer!!
http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
Convection is the transfer of heat by the actual movement of the warmed matter. Heat leaves the coffee cup as the currents of steam and air rise. Convection is the transfer of heat energy in a gas or liquid by movement of currents. (It can also happen is some solids, like sand.) The heat moves with the fluid. Consider this: convection is responsible for making macaroni rise and fall in a pot of heated water. The warmer portions of the water are less dense and therefore, they rise. Meanwhile, the cooler portions of the water fall because they are denser
Conduction is the transfer of energy through matter from particle to particle. It is the transfer and distribution of heat energy from atom to atom within a substance. For example, a spoon in a cup of hot soup becomes warmer because the heat from the soup is conducted along the spoon. Conduction is most effective in solids-but it can happen in fluids. Fun fact: Have you ever noticed that metals tend to feel cold? Believe it or not, they are not colder! They only feel colder because they conduct heat away from your hand. You perceive the heat that is leaving your hand as cold.
Radiation: Electromagnetic waves that directly transport ENERGY through space. Sunlight is a form of radiation that is radiated through space to our planet without the aid of fluids or solids. The energy travels through nothingness! Just think of it! The sun transfers heat through 93 million miles of space. Because there are no solids (like a huge spoon) touching the sun and our planet, conduction is not responsible for bringing heat to Earth. Since there are no fluids (like air and water) in space, convection is not responsible for transferring the heat. Thus, radiation brings heat to our planet.
http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm
What else can I help you with?
What causes a substance to cool down?
A substance cools down when it releases heat energy to its surroundings through processes like conduction, convection, and radiation. This can happen when the substance is in contact with a cooler object, when it loses heat to the air or water around it, or when it emits thermal radiation.
Is there a chemical difference between the gauseos and liquid state of the same substance?
There is no chemical difference, the only difference is the speed in which the molecules of the substances move. Slower molecules can be solid or liquid and very high speed molecules can be gas.
How does the viscosity of a fluid affect its rate of convection?
The viscosity of a fluid affects its rate of convection by influencing how easily it can flow. A fluid with high viscosity will flow more slowly, leading to slower rates of convection. Conversely, a fluid with low viscosity will flow more easily, promoting faster rates of convection.
What is the smallest part of a substance that has all the porperties of the substance?
Molecules are the smallest part of a substance. Molecules have all the properties of a substance.
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.
Is the transfer of temperature from one substance to another called convection?
No, the transfer of temperature from one substance to another is called conduction. Convection is the transfer of heat through the movement of fluids (liquids or gases).
What are the 3 ways that heat can move on from one substance to another?
Conduction convection and radiation
What are 3 ways thermal energy is transfered from one substance to the other?
Convection. Conduction. Radiation
How it is heat generated?
Heat is generated by the movement of atoms and molecules within a substance. As these particles move and collide, they create energy in the form of heat. This thermal energy can be transferred through conduction, convection, or radiation.
How does heat moves through liquid and gases?
Heat moves through liquids and gases primarily through convection. This process involves the transfer of heat energy through the movement of the molecules within the substance. As the substance is heated, the molecules gain energy and move around, carrying heat from one area to another. Additionally, in liquids and gases, heat can also be transferred through conduction and radiation, but convection is the dominant mechanism.
What is the difference between convection and conduction?
Convection. This happens in a fluid (gas or liquid), When a mass of fluid is heated it expands and becomes less dense than the unheated fluid round it. This density difference causes it to rise against gravity, bodily moving the whole mass of warm fluid. Obviously convection could not happen where there was no gravity (eg in a spacecraft orbiting Earth). Conduction. This happens because heat energy causes atoms or molecules to vibrate faster. As they do so they bump into the atom or molecule next to them and cause this to vibrate more. In this way the energy is passed along inside the body of the substance. Obviously this means while convection can not happen in space, conduction and and does. Convection and conduction are related the vibrational energy of conduction is what causes the fluid to expand, its molecules vibrating harder take up more room. Also understand that Heat energy is actually a specific form of Kinetic energy - an energy of motion - but happening at the atomic scale.
How does conduction heat things?
The vibrating atoms/molecules in the hot sustance make the atoms/molecules in the cooler substance vibrate and this vibration gradually spreads along the substance.
What is it called when heat is transferred through a substance by the direct contact of molecules?
Conduction is the process by which heat is transferred through direct contact between adjacent molecules in a substance.
What Is Heat Energy Means?
Heat energy is a form of energy that is transferred between objects due to a temperature difference. It can be transferred through conduction, convection, or radiation. Heat energy is responsible for changing the temperature of an object or substance.
What are the two dominant mechanisms of heat transfer around the world?
Movement of heat around the earth happens mostly via conduction and convection. Conduction involves the transfer of heat as kinetic motion of molecules through most any substance, mostly visible in red-hot metals. Convection involves the movement of air as it heats unevenly, causing warm air to rise and cool air to fall.
When can convection occur in a substance?
Convection can occur in a substance when there is a temperature gradient present, meaning that one part of the substance is hotter than another. This temperature difference causes the warmer, less dense portion of the substance to rise and the cooler, denser portion to sink, creating a convection current.
What are charactaristics of heat energy?
Heat energy is a form of kinetic energy that results from the movement of atoms and molecules within a substance. It can be transferred through conduction, convection, and radiation. Heat energy leads to an increase in temperature and is measured in units such as calories or joules.
