About 4.6 billion years ago, the solar system was nothing more than a cloud of gas and dust known as what? a. a solar universe b. a solar orion c. a solar accretion d. a solar nebula

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.