Just before it is struck by a racket, a tennis ball weighing 0.560 n has a velocity of ((20.0 m/s)i - (4.0 m/s)j). during the 3 ms that the racket and ball are in contact, the net force on the ball is constant and equal to n)i + (110 n)j. a) what are the x and y-components of the impulse of the net force applied tothe ball ? b) what are the x and y-components of the final velocity of the ball ?

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.