Lecture17 - PHYSICS 231 INTRODUCTORY PHYSICS I Lecture 17...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
PHYSICS 231 INTRODUCTORY PHYSICS I Lecture 17
Background image of page 1

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

View Full Document Right Arrow Icon
Heat: Q = Energy transferred due to microscopic contact Heat can: Change temperature c = specific heat For water: c= 1.0 cal/(g°C) Change state of matter L = Latent heat of fusion or vaporization For water: L F =79.7 cal/g, L V =540 cal/g Recap - Heat Transfer Q = μχ∆Τ Q = μΛ
Background image of page 2
Example 11.11 A 50 g ice cube at 0ºC is put into a styrofoam cup containing 300 g of coffee at 90ºC. Assuming no heat is lost to the cup or the air, what is the final temperature of the coffee after the ice melts? T = 65.8°C
Background image of page 3

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

View Full Document Right Arrow Icon
Recap - Kinds of Heat Transfer Conduction Hot and cold objects in physical contact Examples: Heating a skillet, losing heat through the walls Convection Hot objects move (gas or liquid) Examples: Hot-water heating for buildings Circulating air Unstable atmospheres Radiation Energy transferred by light (UV, IR,…) Examples: Stars, Incandescent bulbs
Background image of page 4
Rate of heat transfer Conductivity k is property of material
Background image of page 5

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

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 18

Lecture17 - PHYSICS 231 INTRODUCTORY PHYSICS I Lecture 17...

This preview shows document pages 1 - 6. Sign up to view the full document.

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