Compared to yellow light, orange light has a. a shorter wavelength. b. a wavelength closer to that of gamma rays. c. the same frequency. d. a longer wavelength.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Hydrogen and helium are both members of?

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k