Carla has four marbles that are different sizes. she wants to know how size affects the speed at which the marbles roll
how could she do a scientific investigation to test this?
oa. carla could roll a marble, a block, a ring, and a coin down a slope to see which object rolls the fastest.
ob. carla could look up whether small or large objects roll fastest in a textbook.
carla could roll the different sized marbles down a slope to see whether the small or large marbles roll faster
od.
carla could roll the marbles down different sized slopes to see which angle makes the marbles roll the fastest,
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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