To reverse the direction of current in a motor, current is conducted a. through the armature b. in the direction of rotation c. through the brushes to the commutator d. through the commutator to the armature

Which of the following are appropriate acceleration units?

As the distance from a magnet increases, what happens to the magnet force?

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.