Suppose an electron is placed into a uniform electric field between two metalplates that are 2um apart. What is the strength of the electric fleld if the work done on the electron is measured to be 4.5×10^-12 J. Explain.

Acar of mass m goes around a banked curve of radius r with speed v. if the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to 101) a) mv2/r b) mg/2. d) mg e) tan[v2/(eg)]

Increasing the pressure on one spot of a fluid will increase the pressure everywhere else in the fluid a. pascals principal b. archimedes' principal c. bernoulli's principal

As the ball rolls down the ramp, there are changes in kinetic and potential energy. how much kinetic energy does the ball have when it reaches point b? a) 0j b) 25j c) 50j d) 100