All of the following are examples of physical systems except A) a windmill
B) a scientific theory.
C) the gears of a clock
D) the digestive system of a cow
my answer is either A or B

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false