13-Choose the correct In a certain material there is a current of 16 A flowing through a surface to
the right, and there is an equal amount of positive and negative charge
passing through the surface producing the current. How
much negative charge passes through the surface?
a. 8 C/s toward the right
b. 8 C/s toward the left
c. 16 C/s toward the right
d. 16 C/s toward the left

What is the maximum acceleration of the wing tips, in units of g?

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.