An electron moves along the z-axis with vz=3.0×107m/s. As it passes the origin, what are the strength and direction of the magnetic field at the following (x, y, z) positions? a) (2, 0, 0)... Bx, By, Bz = ?
b) (0, 0, 1)... Bx, By, Bz = ?
c) (0, 2, 1)... Bx, By, Bz = ?

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.