What is the force in newtons exerted by an object with a mass of 15 kg and an acceleration of 12 m/s2?

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.