Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our Privacy Policy and User Agreement for details.

Like this presentation? Why not share!

- AP Physics - Chapter 14 Powerpoint by Mrreynon 4350 views
- AP Physics - Chapter 10 Powerpoint by Mrreynon 9098 views
- Descobre a tua Europa by Maria Santos 15360 views
- AP Physics - Chapter 15 Powerpoint by Mrreynon 10808 views
- GUIA EJERCICIOS RESUELTOS FISICA 11... by Eduardo Mera 42748 views
- AP Physics - Chapter 6 Powerpoint by Mrreynon 15234 views

3,244 views

3,097 views

3,097 views

Published on

No Downloads

Total views

3,244

On SlideShare

0

From Embeds

0

Number of Embeds

17

Shares

0

Downloads

257

Comments

0

Likes

1

No embeds

No notes for slide

- 1. Chapter 13 The Transfer of Heat
- 2. 13.1 Convection CONVECTION Convection is the process in which heat is carried from one place to another by the bulk movement of a fluid. convection currents
- 3. 13.2 Conduction CONDUCTION Conduction is the process whereby heat is transferred directly through a material One mechanism for conduction occurs when the atoms or molecules in a hotter part of the material vibrate or move with greater energy than those in a cooler part. By means of collisions, the more energetic molecules pass on some of their energy to their less energetic neighbors.
- 4. 13.2 Conduction CONDUCTION OF HEAT THROUGH A MATERIAL The heat Q conducted during a time t through a bar of length L and cross-sectional area A is SI Units of Thermal Conductivity: J/(s ·m·C o ) thermal conductivity
- 5. 13.2 Conduction
- 6. 13.3 Radiation RADIATION Radiation is the process in which energy is transferred by means of electromagnetic waves.
- 7. 13.3 Radiation THE STEFAN-BOLTZMANN LAW OF RADIATION The radiant energy Q , emitted in a time t by an object that has a Kelvin temperature T , a surface area A , and an emissivity e , is given by The emissivity e is a dimensionless number between zero and one. It is the ratio of what an object radiates to what the object would radiate if it were a perfect emitter. Stefan-Boltzmann constant
- 8. 13.3 Radiation Example 6 A Supergiant Star The supergiant star Betelgeuse has a surface temperature of about 2900 K and emits a power of approximately 4x10 30 W. Assuming that Betelgeuse is a perfect emitter and spherical, find its radius.
- 9. 13.3 Radiation
- 10. 13.4 Applications A thermos bottle minimizes heat transfer via conduction, convection, and radiation.
- 11. 13.4 Applications The halogen cooktop stove creates electromagnetic energy that passes through the ceramic top and is absorbed directly by the bottom of the pot.

No public clipboards found for this slide

×
### Save the most important slides with Clipping

Clipping is a handy way to collect and organize the most important slides from a presentation. You can keep your great finds in clipboards organized around topics.

Be the first to comment