2. a rock is projected upward from the surface of the moon, at time t = 0.0 s, with a velocity of the acceleration due to gravity at the surface of the moon is what is the maximum height of the rock above the surface?
278 m
125 m
245 m
115 m
202 m

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies. molten iron has a density of 7.0g/cm cubed. in its solid state, iron has a density of 8.0g/cm cubed.

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

Explain why electric current cannot exist if a current doesn't have a voltage source.