06:51duration 6 minutes 51 seconds

Section 3.4 Prob 58: Sensitivity of the eye to…

Section 3.4 Prob 58: Sensitivity of the eye to brightness

Using the quotient rule to study how pupil area responds to changes in light intensity.

06:41duration 6 minutes 41 seconds

Section 3.5 Prob 88: Adiabatic Gas Expansion

Related rates problem -- finding rate of change of volume for a gas expanding (adiabatically) given volume, pressure, and of change of pressure.

04:16duration 4 minutes 16 seconds

Section 3.5 Prob 90: von Bertalanffy revisited

Calculating rate of change of mass of a fish using a model for how length varies with age.