What is the mechanical advantage of a lever that requires an input force of 20N and lifts an object that weighs 60N

Foreshadowing. the prologue states that this is the story of "star-crossed lovers." there are four strong foreshadowings of evil in act 1. identify at least two foreshadowings and explain their purpose.

Orange juice has a lower or higher viscosity than chocolate syrup

What is a good example of instantaneous speed