Which of the following is an example of the absolute threshold? a. dimitri turns down the shower because it is too hot. b. sam recognizes that the restaurant lights have suddenly dimmed. c. georgia notices that her soup tastes much spicier than it did last night. d. juanita barely detects someone tapping on her window pane. e. bill can't quite see who the person is across the field. i'm not sure.

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?

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

Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving