A torch is dropped down a large chasm. It takes 10 seconds to hit the ground. How deep is the chasm? 490m
49m
98m
980m

If steel is more dense that lake water, why can a boat float

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.

What electron configurations do atoms usually achieve by sharing electrons to form covalent bonds?