1 / 8

What is heat?

What is heat?. March 4, 2014. Why does ice feel cold to the touch?. Ice on hands cause the heat in your hand to go into the ice causing it to melt What is this heat? Energy transferring between objects at different temperatures. What form of energy is being transferred as heat?.

edythe
Download Presentation

What is heat?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. What is heat? March 4, 2014

  2. Why does ice feel cold to the touch? • Ice on hands cause the heat in your hand to go into the ice causing it to melt • What is this heat? Energy transferring between objects at different temperatures

  3. What form of energy is being transferred as heat? • Thermal energy – total kinetic energy of the particles that make up a substance • Kinetic – energy of motion • Warmer objects have more kinetic energy than cooler The amount of kinetic energy transferred is dependent on 2 factors:

  4. 1. The difference between the temperatures, the greater the difference the more the thermal energy transfer • 2. The amount of matter • Ex. Warm bricks have more thermal energy than a small marble

  5. What is thermal equilibrium? • Point at which 2 objects touching each other reach the same temperature no difference in kinetic energy

  6. Can energy only be transferred by touching? • No, 3 different ways: • 1. Conduction – transfer of energy as heat goes through 1 material into another • Ex. Frying pan on hot stove • Heat from the stove is transferred by the hot coils on stove to the frying pan

  7. 2. Convection – transfer of energy by the circulation or movement of a liquid or gas • Ex. Water heating, boils, as water heats it rises to the surface as cooler water sinks • Convection current – motion of warmer material rising and cooler material sinking

  8. 3. Radiation – transfer of energy as electromagnetic waves • Ex. Getting warmed by the sun

More Related