If three 1.5V 2.3Ah batteries are connected in series, the output voltage is_-
3.0 Volts
0.0 Volts
4.5 Volts
1.5 Volts

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.