(3 points) what is the best description of the constructive interference of light? a. two waves have the same direction of displacement. b. a longitudinal wave meets a transverse light wave. c. a mechanical wave meets a transverse light wave. d. two waves have displacement in opposite directions.

Select the atomic models that belong to the same element

Apeak with a retention time of 407 s has a width at half-height (w1/2) of 7.6 s. a neighboring peak is eluted 17 s later with a w1/2 of 9.4 s. a compound that is known not to be retained was eluted in 2.5 s. the peaks are not baseline resolved. how many theoretical plates would be needed to achieve a resolution of 1.5?

Express the following number in scientific notation. 0.026890 =