2. The following series circuit (with a battery, switch, resistor in series with a capacitor, and an ammeter) is set up. C = 800F
R = 1k ohms
V = 8V

(a) Calculate the maximum initial charging current when the switch is
closed.
(3)
(b) When the voltage across the capacitor is 3 V, calculate what the
reading on the ammeter will be (4)
(c) If R is replaced with a 2 k ohms resistor, what effect will this have on
the maximum current?
(1)
(d) How does this change affect the time taken to charge up the
capacitor?
(1)

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

A3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular? a 3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular?

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •