All of the following are possible source of error in a scientific investigation except for? a)discovering new variables as the experiment proceeds b)not controlling all the variables in a experiment c)adding research resources during an investigation d)measuring the materials of an experiment incorrectly

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 two required components for a generator are

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in