In the united states, most of our energy comes from this non–renewable resource, which has a negative effect on the environment. coal nuclear natural gas petroleum #ned answer asap!

A1kg cart slams into a stationary 1kg cart at 2 m/s. the carts stick together and move forward at a speed of 1 m/sl. determine whether kinetic energy was conserved in the collision. use the law of conservation of energy to explain the collision

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Acar travels 40m in 8 seconds find the car speed