Diffusion vs. facilitated transport
a. if diffusion was the only mode of oxygen transport, how long would it take for a molecule of oxygen to diffuse from your lungs to the most distal part of your body (toes)? assume d = 2.1 x 10-5 cm2/s and work the problem for 1-d, 2-d and 3-d.
b. compare this diffusion time with the amount of time a red blood cell travels from your heart to your big toe.

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.