Thermoelectric Bridge CER: Design and Draw In our demo, we tested a prototype of a bridge that used solar
radiation to conduct thermal energy to thermoelectric generators
to generate electricity. Design and draw a bridge that will
efficiently conduct thermal energy to the generators. Will you
leave the generators on top of the bridge as in the demo or will
you move them? How can you use your knowledge of insulators
and conductors to protect the generators from overheating and
burning like they did in our demo? Be creative as you design
your bridge! Make it functional as well. Where will people walk,
bikes ride, and cars drive? Will you include anything aesthetic
(visually appealing)? Draw and label your bridge below!
Include:
- 3 generators
- Bridge
- Sun
- Convection, conduction, radiation labeled
1. Where did you place the generators, and how does affect
receiving thermal energy?
2. What insulators and/or conductors did you utilize?

roar

Explanation:

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.