A block is attached to a spring. The spring constant is 20N/m. If the spring is compressed by 10cm, what is the maximum vertical height that the block can reach when it is released? The total mass of the block and spring is 80g. (g = 9.8N/kg)

The frequency of a given region of the electromagnetic spectrum ranges from 3 × 1016 − 3 × 1019 hertz. which type of wave is found in this region? a. x-rays b. ultraviolet rays c. infrared waves d. radio waves

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

An object in mechanical equilibrium is an object