Which would be the easiest way to move a heavy box up 4 feet? to lift it up. to slide it up a 8 foot ramp. to slide it up a 4 foot ramp. to slide it up a 2 foot ramp. w

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.

According to the second law of thermodynamics, what is true of entropy in all natural systems? a.it will always decrease. b.it will always increase. c.it will always remain the same. d.it is impossible to measure. e.it will always equal zero.

The chart shows the amount of solute that fully dissolved when added to 500 ml of water. which ranks the solutions in order of greatest to least solubility? x → y → z y → x → z z → x → y y → z → x