an astronaut throws a wrench in interstellar space how much force is required to keep the wrench movie constantly with constant velocity

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

This is the substance(s) formed in a chemical reaction.

In a good thermo flask the main cause of heat loss is