Situation 2: A NASA engineer wants to see if salt will reduce the amount of ice and snow buildup on the runway. She spread 200 lbs of salt on a test runway and simulates an airplane
landing by using test equipment. She then repeats the test on a runway without applying salt.
Hypothesis
If
then
I
Situation 3: The tree house detectives want to see if different smells travel at the same speed.
They spray a can of hairspray, peppermint air freshener, and insect repellant at the same time.
Six friends stand around them in a large circle, five feet from the center of the circle where the
three tree house detectives stood.
Hypothesis:
If
then
Situation 4: The tree house detectives want to know if the candy making process affects the
odor given off by candy. To conduct the experiment, the help Dr. D make orange taffy candy.
Hypothesis:

In the future, people will only enjoy one sport: electrodisc. in this sport, you gain points when you cause metallic discs hovering on a field to exchange charge. you are an electrodisc player playing the popular four disc variant. the disks have charges of qa = −8.0 µc, qb = −2.0 µc, qc = +5.0 µc, and qd = +12.0 µc. (1) you bring two disks together and then separate them. you measure the resulting charge of these two disks and find that it is +5.0 µc per disk. which two disks did you bring together? (a) a and b (b) a and c (c)a and d (d)b and c(e) b and d (f) c and d. (2) you bring three disks together and then separate them. you measure the resulting charge of these three disks and find that it is +3.0 µc per disk. which three disks did you bring together? a, b, and c (a) a, b, and d (c) a, c, and d (d) b, c, and d. (3) given the resulting charge of each disk measured in (b) is +3.0 µc, how many electrons would you need to add to a disk of this charge to electrically neutralize it? electrons