I really need the help, thx

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)