I really dont know physics

What is a subatomic particle with a negative charge and very little mass?

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.

For most stars, what does a higher temperature tend to to with? a lower luminosity a higher luminositya red color none of the above