Which are the best solutions for reducing the mine production of copper and conserving copper ore? a. recycle electronic waste.***b. make electrical appliances without wires. c. stop buying electrical appliances.**d. use aluminum as a substitute. e. use glass as a substitute.

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

What are the three ways that an object can accelerate

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.