both the esophagus and the small intestine are involved in the digestion of food.  the esophagus squeezes food into the stomach by wave-like muscle contractions.  peptidase enzymes in the small intestine break food molecules into smaller molecules.

which statement best describes changes to food during digestion?

  a. 

the muscle contractions result in chemical changes, while the action of the peptidase results in physical changes.

  b. 

the muscle contractions result in physical changes, while the action of the peptidase results in chemical changes.

  c. 

the muscle contractions and the action of the peptidase both result only in chemical changes.

  d. 

the muscle contractions and the action of the peptidase both result only in physical changes.

For questions 1 and 2, consider the following experimental data.hydrogen emission lines were detected at the following wavelengths (in nm): 121.6102.697.395.093.8question 1use the electromagnetic radiation classifications below and figure 1-1 in the introductory information for this lab (in the lab manual) to determine the nf value for the experimental data provided? wavelength, ? (nm) 650 700 550 600 400 450 500 visible spectrum wavelength, ? (m) 11 10 3 10 10 10 8 10 5 10 10 -10 10 9 10 10 10 10 -12 10 microwave radio infrared x-ray ultraviolet gamma 1020 1019 1018 1 1016 015 1014 01 12 109108 frequency, v (hz)a.1b. 2c. 3d. 4e. 5question 2using the data for the emission line with the longest wavelength, the known value of nf (from question 1 in this prelab), and the value of ni (deduced from the ? and nf values) calculate the rydberg constant for hydrogen (rh) in units of m-1.a) 1.097 x 10-11 m-1b) 5.921 x 107 m-1c) 1.097 x 10-2 m-1d) 9.252 x 106 m-1e) 1.097 x 107 m-1