Two technicians are discussing reasons why the brake fluid level in the master cylinder might drop. technician a says that it is normal for the fluid level to drop as the brake linings wear. technician b says that a hydraulic leak in the system will cause fluid level to drop. who is correct?
a) technician a
b) technician b
c) technician a and b

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.

The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?