APES HW 2.10.22

APES HW 2.10.22

Your 4.5 kW hot water heater has two elements, total 9 kW. It runs for 6 hours each day, and electricity costs $0.36 per kWh.

1. How much would this cost you per day?
2. How much would it cost you per month?
3. Per year?
4. What steps could you take to reduce your expense for this hot water heater? Include anything you learned from your lab

DBQ practice

BBC news hour 2022 02 09 0526AM

Listen to this interview in two parts. The first is about climate change and the warming of the oceans. The second is about fusion power.

1. The use of the word “commons” may resonate with you. How does this relate to the tragedy of the commons you studied?
2. What percentage of the earth is this “commons”?
3. Why is the change in temperature for the ocean less than that of the atmosphere?
4. How much heat has been added to the oceans every second since 1890?
5. How much heat is being added now?
6. What temperature would the air be without the oceans? (not the change, the average temperature)
7. How much sea level rise will you see when you are 96 years old?
8. Why are coastal ecosystems important in this view?
9. Why are coral reefs important according to the interview?
10. What is happening to them, and why?
11. How will this impact fishing?
12. The removal of carbon dioxide from the atmosphere changes which heat transfer mode for the planet?
13. “Clean energy” means what?
14. What is the difference between fusion and fission?
15. What was the fusion breakthrough?
16. How much power was released? (a “kettle” is the British term for the same tea water heaters you measured this week, use your data)
17. Why is this so difficult?
18. How long have we been working on this solution?
19. What temperature is needed?
20. If this succeeds in your lifetime, how will it change your life?