Lecture26

Physics 101: Lecture 26 Conduction, Convection, Radiation ,[object Object],Final

Calendar ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Review ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],07

Heat Transfer: Conduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],demos T H Hot T C Cold L =  x Area A 13

Conduction ACT ,[object Object],[object Object],[object Object],[object Object]

Preflight 1 ,[object Object],[object Object],[object Object],[object Object],more heat would be likely to escape through the thin sheet than the thick blanket. . The area between the sheet and the blanket is not getting hotter or colder. The same amount of heat flows. I need to go do some further research to get a real answer, sleep time... 15 I’m in the hospital correct

Conduction w/ 2 layers ACT ,[object Object],[object Object],[object Object],[object Object], x 1 = 0.02 m A 1 = 35 m 2 k 1 = 0.080 J/s-m-C  x 2 = 0.075 m A 2 = 35 m 2 k 2 = 0.030 J/s-m-C 19 Inside: T H = 25C Outside: T C = 0C H 1 H 2 T 0

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Conduction w/ 2 layers  x 1 = 0.02 m A 1 = 35 m 2 k 1 = 0.080 J/s-m-C  x 2 = 0.075 m A 1 = 35 m 2 k 1 = 0.030 J/s-m-C 22 Inside: T H = 25C Outside: T C = 0C H 1 H 2 T 0

Conduction ACT ,[object Object],[object Object],24

Heat Transfer Convection ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],demos 27 heater

Heat Transfer: Radiation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],DEMO 35 T Surroundings at T 0 Hot stove

Heat Transfer: Radiation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],HW 38 T Surroundings at T 0 Hot stove

Earth Homework ,[object Object],[object Object],I net = I emit - I absorb = eA  (T 4 - T 0 4 ) 42

Preflight ,[object Object],Black absorbs heat so the asphalt is hotter 45 The black asphalt contains salt . I want summer! physics I’m in the hospital

Summary ,[object Object],[object Object],[object Object],50

Lecture26

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Lecture26

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