What is the net force on a 2-kg skateboard accelerating at a rate of 2 m/s2?

Which type of current is produced by a wire breaking magnetic field lines and changing the polarity? a. alternating b. direct c. straight d. alternating and direct

Abird sitting high in a tree is an example of what type of wnergy

Ihave this 50 question test the layer of earth's atmosphere where atoms and molecules escape into space is referred to as the a) exosphere b) ionosphere. c) mesosphere d) thermosphere