HELP!! Which two units of measurement are commonly
used to measure heat?
A. calorie and joule
B. joule and degree Celsius
C. calorie and degree Celsius
D. degree Celsius and degree Fahrenheit

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

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

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