Lecture 21_Chapter9

Lecture 21_Chapter9 - 1 Lecture 21 Chapter 9 Thermal Energy Home Work Chapter 9 Key Terms Review questions 2 3 6 7 11 12 Exercises 1 2 7 8 10 19

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 Lecture 21: Chapter 9 Thermal Energy Home Work: Chapter 9 ! Key Terms ! Review questions: 2, 3, 6, 7, 11, 12 ! Exercises: 1, 2, 7, 8, 10, 19 Energy and its main forms The Universe is made up of matter and energy. Matter is made up of atoms and molecules. The motion of atoms and molecules creates a form of energy which is called thermal energy . ! Good Web Site: http://coolcosmos.ipac.caltech.edu//cosmic_classroom/light_le ssons/thermal/heat.html Light, electrical, mechanical, chemical, nuclear, sound energy can be converted into thermal energy . Energy can take on many forms and can change from one form to another A thermal infrared image of a ball before (left) and after (right) being bounced. 2 How we measure heat or thermal energy? Temperature! Definition of temperature Temperature is a measure of average kinetic energy per molecule. Temperature is a measure of the average kinetic energy of the constituents Cold warm hot Cold hot How we measure the temperature? ! Thermometers are special devices that measure temperature by expansion or contraction of a liquid contraction of a liquid or some materials. ! In common thermometers, a colored alcohol or mercury is used. Units to measure the temperature ! There are different units/scales to measure temperature. ! 1. The Celsius scale uses the scale of 100 degrees between the freezing point of water (0) and boiling point of water (100)....
View Full Document

This note was uploaded on 05/27/2011 for the course PSC 1121 taught by Professor Khankasayev during the Fall '08 term at Florida A&M.

Page1 / 5

Lecture 21_Chapter9 - 1 Lecture 21 Chapter 9 Thermal Energy Home Work Chapter 9 Key Terms Review questions 2 3 6 7 11 12 Exercises 1 2 7 8 10 19

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online