Asquare loop of wire, with sides of length a, lies in the first quadrant of the xy plane, with one corner at the origin. in this region, there is a non uniform time-dependent magnetic field b(y, t) = ky3t2 ˆz (where k is a constant). find the emf induced in the loop.

Phase changes are chemical changes. true or false

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s