Zach, whose mass is 76 kg, is in an elevator descending at 10 m/s. The elevator takes 3.3 s to brake to a stop at the first floor. Part A What is Zach's weight before the elevator starts braking

be subject to a force andchange its motion

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up

no. dot product   =0 when vecs at right angles

d) physical means can be used to separate the components of air.