Cnt PHY 32 Lab Manual-Spring 2017-Hartnell PHY 32 Lab Manual-Spring 2017-Hartnel

Question

Cnt PHY 32 Lab Manual-Spring 2017-Hartnell PHY 32 Lab Manual-Spring 2017-Hartnell College LAB 6 Heat Transfer Introduction already know that when something is moving it has energy. When we talk about the energy that that these particles have heat atoms and molecules have when they are mowing in a solid, liquid, or gas, we say t gy. Heat energy is just energy of motion when it involves atoms or molecules. If somethi ener particles have more heat energy (they are moving faster) and we say that it is at a higher temperature. If something is cool, its particles have less heat energy (they are moving slower) and we say that it is at a lower Like other forms of energy, beat energy can be heat transfer. When a moved from onc place to asother. When this happens we call it some of their energy and the particles in the cool object gain that energy. This is a transfer of heat. Heat is always transferred from warm objects to cool objects. So when heat energy is transferred, the warm energy and gets cooler while the of nature: heat energy is always transferred from something warm to something cool object loses some cool object gains some of this energy and gets warmer. This is an important law There are three different ways that heat can be transferred: convection, radiation, and conduction Convection When heat is added to a fluid (a liquid or a gas), the partic moving faster. This means that the part of the fluid that gains les gain energy and spread out a bit because they are rest of the fluid. This happens when you put a pan of cool water on a hot stove. The water at the bottom of the pan is warmed by the stove and rises to the top surface of the water. Cool, denser water at the way heat is circulated throughout all of the sinks to replace this liquid and it in turn is heated by the stove. In this water very quickly by convection emit electromagnetic waves that carry energy and travel through space at the speed of light. Some nd infrared light. When these waves arrive at the examples of these waves include radio waves, visible light, a surface of some object (the ground, your skin, the wall of a house, etc.), the energy they carry is absorbed and . The object that emitted the energy gets a little cooler energy. Black objects absorb and emit radiation the transformed into heat energy making that object get warmer Radiation is the name we give to this type of transfer of heat best while shiny and white objects do the poorest job of absorbing and emitting radiation. Conduction What a bar of metal is heated at one end, heat is transferred to the other end. We can tell his happens because the other end will get warm after a the metal at the cool end are gaining energy. This happens because each particle at the warm end passes on some of its energy to its cooler neighboring particles further down the bar. The result is that the energy (heat) conducts from the warm end of the bar to the cool end while. Remember, what his means is that the particles (atoms and molecules) in Equipment Beaker Thermometer Stop watch Four metal bars (aluminum, brass, copper, and steel) l bars 14

Explanation / Answer

As this is an experiment based question, Table 2 can be filled after doing the experiment which you are supposed to do.

However,I can provide the solution for table 2. Later on , you can compare the values.

Out of copper, aluminium, brass and steel , Copper has the highest heat conductivity and is an excellent conductor of heat with a heat conductivity value of around 386 W/mK .

Then comes, Aluminium with heat conductivity value of around 237 W/mK

Then comes Brass with heat conductivity of around 120 W/mK

At last, we have steel with worst thermal conductivity.

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