A positively charged particle is at rest on the positive z axis in reference frame S. Reference frame S′ is moving along the positive x axis of S, reference frame ′S″ is moving along the negative x axis, and reference frame S′′ is moving along the positive y axis, all with speed v relative to S. The axes of all the reference frames are oriented the same way, and their origins coincide at instant t = 0, when observers in each reference frame make measurements.

Required:
a. Write expression for the electric field component Ex at the point (x, y,z) in the reference frame S.
b. Write expression for the electric field component Ey at the point (x, y,z) in the reference frame S.
c. Write expression for the electric field component Ez at the point (x, y,z) in the reference frame S.

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

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