Rahul was observing how lab attender Rajeev dilutes concentrated Hydrochloric acid . He became interested and took permission from her to help Rajeev in this activity. What is the correct procedure to do it and why?

Disney, viacom and aol time warner are examples of

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

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.