Assignment:
1. What is air temperature? (What are we measuring exactly when we measure with a thermometer?)
2. (fill in the blank) The Earth's temperature is at ___288_____ Kelvin and most of its radiation power and energy fall within the ___infrared___________ part of the electromagnetic spectrum.
3. (fill in the blank) The Sun's temperature is at approximately ___5800_____ Kelvin and most of its radiation power and energy fall within the _visible_part of the Electromagnetic Spectrum.
4. The temperature of an object goes up by 1 K (say from 290 K to 291 K). How many degrees Celsius did it increase? How many degrees Fahrenheit did it increase in?
5. One night you look up in the sky and you see two different color stars next to each other (however many lightyears away from earth). One star is blue and the other is red. Which star is at a hotter temperature? How do you know?
6. You can dim an incandescent bulb by decreasing the temperature of the filament. What do you think happens to the color of the bulb as it dims?
7. If you leave a 100-W light bulb on for a week, how many joules of energy will be consumed? Show your work.
8. How many Joules (J) does 1 single Oreo contain? [1 food calorie = 1000 energy calories (or 1 kcal); 1 chemical energy calorie = 4.186 J] Show your work.
9. Why are incandescent light bulbs being phased out in many countries (including the United States)? Please give a scientific explanation not a political explanation .
10. Your bank account has the same balance on April 1 as it did on March 1. Your friend suggests that this means that you did not deposit or withdraw any money for the entire month. Is that correct? Explain why or why not.
11. In one complete sentence, list 5 things in your lives that you use every day that require radiation to work.