What is the input of a person pulling a rope 20 meters with a force of 200 n

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

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

Atomic nuclei of almost all elements consist of