A 18.0-g ball is attached to a 110-cm-long string and moves in a horizontal circle (see the figure). The string exerts a force on the ball that is equal to 0.210 N.

Why do electron microscopes have higher resolving power than light microscopes?

What are the applications of electromagnetic waves

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?