What speed is a car going if it takes 2 hours to go 80 miles?

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

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

Which component of the earth’s atmosphere is decreased due to photosynthesis?