Hello,
Wind power generates <span>B) air pollution
Glad to help.
-TwizzlersGuy</span>
Number b I think is right
Dopamine (DOP) is the "pleasure" neurotransmitter involved in addiction and positive reinforcement.
The answer is called the basal plate. Hope this helps.
Most likely the students are using a crude measurement of time, like a stopwatch. They would get the best results with a scientific apparatus that uses a computer and optical sensors. Even recording their dropped objects with a video camera and analyzing the video would give more consistent results. Results will also vary greatly if different people are taking the time measures instead of one person making all measurements.