An egg is placed at the bottom of a bowl filled with water. salt is slowly added to the water until the egg rises and floats. from this experiment, one can conclude that
a) the density of salt water exceeds the density of egg.
b) calcium in the eggshell is repelled by sodium chloride.
c) buoyant forces do not always act upward.
d) salt sinks to the bottom.
e) none of the above

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.