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Ch. 10 Sec. 2 Heat Transfer

Added Jan 14, 2016 •

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today we're going to look at the different types of energy transfers conduction convection and radiation we will first start with conduction let's take a look at a picture that represents conduction what do you think conduction means just by looking at this picture conduction is a transfer of or thermal energy by touching it occurs in solid what is the transfer of heat from the a part of an object to the cooler part of the same object for example if you have a pot that is on the stove it's going to get hot on the surface at touch a better and I will continue to move to the cooler part of the part of the pot that is up at the top it can also be transferred from hotter object to a cooler object refer back to the picture on the picture of the metal spoon with leaning up against the metal pot that metal spoon will become hot because that heat will be transferred from the Hot Pot to the cold spoon  the next type of energy transfer we're going what that is convection take a look at this picture what do you think convection means alright convection unlike conduction where is in liquids and gases it is the transfer of heat through the movement of particles  foreign particles cool particle fill in the space below so this is a circular motion think about a house have you ever noticed that maybe upstairs or that it it gets warmer that's because the warm air rises and it's usually colder downstairs  alright the third energy transfer going to discuss is radiation take a look at the picture and decide what you think radiation means is the transfer of energy as waves and it travel through matter or empty space so radiation what we usually think about is the sun the Earth is warm because the race from the Sun are traveling through matter and casting the heat to the Earth so let's take a look at one more picture this picture straight all three forms of energy transfer  right now want you to take a moment to look at this picture and how conduction convection and radiation are demonstrated in the visualization

Uploaded by Greg Grammer.

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Ch. 10 Sec. 2 Heat Transfer

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