Find the average acceleration of a northbound subway train that slows from 12 m/s to 9.6 m/s in 0.9 s

question options:

-2.7 m/s2

2.7 m/s2

2.7 m/s

-2.7 m/s

Which type of wave can travel without a medium

State the following: boyle's law and charle's law

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c