Three equal 1.75-μc point charges are placed at the corners of an equilateral triangle whose sides are 0.250 m long. what is the potential energy of the system? (take as zero the potential energy of the three charges when they are infinitely far apart.

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good