A point source emits monochromatic electromagnetic waves into air uniformly in all directions. You measure the amplitude Emax of the electric field at several distances from the source. After graphing your results as Emax versus 1/r you find that the data lie close to a straight line that has slope 25.0 N⋅m/C. What is the average power output of the source?

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

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

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat