At a location that is 30 m from wave source A and 4.70 m from wave source B, destructive interference occurs. Source A and source B are coherent and in phase. What is the maximum wavelength (in m) of the waves?

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a. true or b. false

An electric power distributor charges residential customers $0.10 per kilowatt-hour (kwh). the company advertises that "green power" is available in 150 kwh blocks for an additional $4 per month. (green power is generated from solar, wind power, and methane sources.) if a certain customer uses an average of 391 kwh per month and commits to one monthly 150 kwh block of green power, what is her annual power bill