B-1: Seth is doing his student driving with the "Give-Me-A-Brake” driving school
and is traveling down the interstate with a speed of 9.0 m/s. Mack is driving
his "18-wheeler" down the fast lane at 27.0 m/s when he notices Seth 30.0 m
ahead of him in the right lane. a) If Mack and Seth maintain their speeds, how
far must Mack travel before he catches up to Seth? b) How long will this take?

Energy is the ability to do work which measures what

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

Ajoint produces movement when its angle decreases. which type of movement is it?