Rachel carson's book silent spring, documenting the poisonous effects of the pesticide ddt, health officials worldwide who were proponents of the chemical's use.
a. improvised
b. refuted
c. reposed
d. speculated

Avalue that describes how heavy an object is and is related to the force of gravity is

Why don't you see your reflection in water with waves or repples

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?