The law of universal gravitation can be expressed as where F is the force of attraction. G is the universal graviational constant (6.674*10-11 N-m2-2) mi is the mass of the first object, m2 is the mass of the second object, and r is the distance between the centers of the two objects. A 1.2-kilogram container of sugar sits 23 meters away from a 9.4-kilogram bag of flour. What is the gravitational force of attraction between the sugar and the flour?

As , plants meet their needs for making food from air, soil, water, and the sun's energy in a process called there are plants called grow high in trees without here are words to put in the blanks. 1.) producers 2.) consumers 3.) chloroplasts 4.) epiphytes

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

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?