Why does heat travel faster by conduction then some objects?
914449
Each material has a property known as "thermal conductivity" its  how easily or hard for heat can travel through a material. Heat will travel faster on materials with high or good thermal conductivity such as aluminum or copper and not as fast on material such as ceramics or bricks with low or poor thermal conductivity. \n\nThis has something to do with their atomic structure and bond strength between atoms. Think of atoms attached together with springs. When heat is introduced, atoms will start vibrating and its energy (from the heat) will "bounce" or shake its neighboring atoms and shake its other neighbor and so on... until every atom are shaking like crazy because they are transferring heat to the rest of the material.  Some takes more heat (or energy) to disturb the atomic structure of a material and heat doesn't travel or conduct "well" thru it. I hope this makes sense...
112062
Heat conductivity? electrical?
1134140
Depends on the thermoconductive properties of a certain material. Copper for example will heat up or cool down very fast.
674634
Heat is transferred by conduction, convection and radiation. In medium-temperature applications radiation would only be a small part of the total, and an opaque material will prevent radiative escape of heat in any case. Conduction and convection are minimized by the structure of a typical insulator in addition to the material properties mentioned in the first answer. Styrofoam, for instance, consists of very thin partitions of styrene plastic which enclose gas-filled bubbles. This means each convection cell or mixing space is small and essentially a small proportion of the total insulation thickness, so you don't have the coldest internal gas mixing with the hottest gas. Conduction is low because gas conducts heat more slowly than a solid. The conduction path through the solid styrene is convoluted and of small thickness, both of which minimize conduction. In houses, fiberglass insulation uses similar principles except that the air spaces are connected. This means a larger convection cell potentially exists, but it is baffled by all the glass strands, so circulation and mixing are much slower and smaller-scale.
402851
Thermal convection involves the transfer of heat away from something warm by action of the air in contact with it.  This occurs because the air near the object is heated by direct contact with it.  As a gas, the air molecules move faster when heated and drive the nearby molecules farther apart.  This makes the number of molecules in any particular volume become less that the more distant, cooler air.  Thus the density of the heated air becomes less, making it buoyant compared with the cooler air.  Thus, gravity makes the warm air rise away from the warm object, carrying away some of its heat.  The process continues as new, cooler air then comes into contact with the warm object.
649898
No, that is not true.  If you have a more dense metal, it may take more energy to heat it up, but that is because there is more mass.  Water has a very high specific heat, but it is definately less dense than metals.  I believe specific heat is determined by quantum mechanical properties.
1003847
The study of heat and how it behaves.
953505
A current is simply a flow of electrons in a direction.  These electrons collide with the materials in the wire, which in turn vibrate, thus producing heat.  A curving wire re-directs the flow of the electrons, whose inertia resists the change in velocity (direction).  The material must then act upon the electrons normal to the curve, which produces stronger collisions (greater resistivity) and thus more heat.
364422
In physics, heat is defined as energy in transit. Generally, heat is a form of energy associated with the motion of atoms, molecules and other particles which comprise matter. Heat can be created by chemical reactions (such as burning), nuclear reactions (such as fusion taking place inside the Sun), electromagnetic dissipation (as in electric stoves), or mechanical dissipation (such as friction). Heat can be transferred between objects by radiation, conduction and convection. Temperature, defined as the measure of an object to spontaneously give up energy, is used to indicate the level of elementary motion associated with heat. Heat can only be transferred between objects, or areas within an object, with different temperatures.
71275
Heat is the kinetic energy of molecular motion. The molecules of a hot object are in rapid motion; the hotter, the higher the average speed and the greater the thermal energy. If the object is gaseous the motion consists of free-path travel and collisions with other molecules. If it is liquid the paths between collisions are shorter, and if solid the motion is vibrational with no secular movement.
650119
Less dense materials are better insulators. The denser the material, the closer its atoms are together. That means the transfer of energy of one atom to the next is more effective. Thus, gases insulate better than liquids, which in turn insulate better than solids.\n\nAn interesting fact is that poor conductors of electricity are also poor heat conductors. Wood is a much better insulator than copper. The reason is that metals that conduct electricity allow free electrons to roam through the material. This enhances the transfer of energy from one area to another in the metal. Without this ability, the material--like wood..AND IN YOUR CASE RUBBER--does not conduct heat well.
119158
All Metals are tend to loose their electrons easily.\nSo if U heat an metal Rod then it's electrons gets energy by heating and start transferring to the other end of the Metal rod. So the other end is seemed to hot
902433
Conduction- the transfer of heat to a particle of matter without the movement of matter itself.\n\nConvection- the transfer of heat to a particle of matter with the help of movement of the matter.\n\nRadiation- the transfer of energy through electromagnetic waves.
862763
He's right... electrons move slowly, but electricity travels fast.  Think of it as a tube filled with marbles.  Push one in and one comes out the other end nearly instantly.  They're both fast, but are different constants.\n\nAddition:  The speed of electricity is typically compared to the speed of light using a "velocity factor" (http://blog.plover.com/physics/electricity-speed.html).  This relates the speed to the speed of electromagnetic energy in a vacuum (for instance, light).  Air actually appears to be one of the fastest.
971459
All 3 are different modes of transferring heat\n\nConduction: This is generally seen in metals, because they have free ions. When a metal is heated, the free ions which are in the lower orbit get excited. These ions move to the higher orbit and in turn excite the ions in the adjoining molecule. In this way heat is transferred. This is not seen in non-metals because they don't have free ions.\n\nConvection: Seen in water, air and other liquids and gases. Convection takes place due to imbalance in temperature in different parts of the liquid (or gases). Due to heat being applied, the hot liquid (or air) goes upwards and the cooler liquid (or air) goes downwards, thus creating a cyclic current. As this liquid gets heated further, it moves upwards again and the now cooler liquid goes downwards.\n\nRadiation: It is the only form of transfer of heat that DOES NOT necessarily require a medium to transfer heat. Radiation takes place in the form of electromagnetic waves. Radiation can even transmit through vacuum, unlike Conduction and Convection which require a material medium. Eg. Radiation of heat by the Sun to Earth.
409960
Light is faster because electricity has to interact with the atoms it finds as it moves along a wire. Electricity is only a BIT slower than light, but you cannot tell the difference in real-life situations.
1187086
Higher temp = faster diffusion. Higher temps give the atoms more heat, which is basically a faster rate of the atoms vibrating. If they move around faster, they'll obviously diffuse farther in the same amount of time. Next time, do your own homework