Ipush a box with mass 10 kg across a 15 m room. if i apply a force of 20n to do this how much work is being done on the box?

Why is alchemy not considered to be a science ?

Which best represents the law of conservation of mass ?

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