A particle charge q = 1.1 × 10-7 C is at the center of a spherical cavity of radius 3.0 cm in a chunk of metal. Find the magnitude of the electric field (a) 1.6 cm from the cavity center and (b) anyplace in the metal.

An astronaut on the moon throws a baseball upward. the astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 3030 ft per sec. the height s of the ball in feet is given by the equation s equals negative 2.7 t squared plus 30 t plus 6.5s=−2.7t2+30t+6.5, where t is the number of seconds after the ball was thrown. complete parts a and b.