What is the mass of a child whose father uses 250 J to lift the child a distance of .75 meters?

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.

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?