Lect2 -- Energy Transformation

# Lect2 -- Energy Transformation - 2013829 BlackBodyRadiation...

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

2013 8 29 1 Energy Transformation Black Body Radiation Examples of Energy Transformation How stuff works The Second Law of Thermodynamics 1) What is the First Law of Thermodynamics? 2) What determines the color of light that a hot object emits: a) its color in reflected light; b) its temperature; c) its heat capacity; d) its mass 3) Which of the following releases more potential energy? Pop Quiz #2 a) Lower 1 kg water by 60 m; b) Lower 2 kg lead by 20 m. 4) The electromagnetic force between two charged particles depends on: a) the sum of the two charges; b) the product of the two charges; c) the separation of the two charges; d) all of the above; e) only b and c 5) Kilowatt hours is a measure of: a) Force b) Power c) Energy d) none of the above. The Electromagnetic Spectrum Electromagnetic spectrum Visible Spectrum: What determines Color of Light Emission? Black Body Radiation All objects emit electromagnetic radiation, with a spectrum that depends on absolute temperature. There are 2 characteristics: λ max = (constant)/T Total =(const)*T 4 T is K Spectrum

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

View Full Document
2013 8 29 2 35% reflected 65% absorbed, reradiated as Earthlight (IR) Sunlight (visible) Earth Radiation Balance Earth temp changes until Input = Output Earth Sun System Fusion of Hydrogen to Helium + Energy T = 5778 K Electromagnetic Radiation Black Body Spectrum.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern