Physics, 22.08.2019 20:20, destromero
Consider the flow of a fluid down a long cylindrical tube (of radius a). ignore any viscous effects and assume "plug flow" (velocity is in the z direction with speed v, independent of r or z). the fluid carries with it some molecules of con- centration c(z). the number of these molecules moving down the tube in the z direction per unit time per unit area is j.(z) = vc. the molecules can diffuse radi- ally out through the wall of the tube. the concentration of molecules outside the tube is zero, so the number of molecules moving in the r direction out through the tube wall per unit time per unit area is ja(z) = kc. a) analyze a section of the tube between z ånd z+az. use conservation of the number of molecules to determine a differential equation describing the steady- state concentration distribution, c(z). b) assume that at z = 0, c = co. derive an expression for c(z).
Answers: 1
Physics, 22.06.2019 02:40, jordynsmith02
If the wheels lock when braking suddenly the vehicle: a: loses traction b: lose steering wheel ability c: gain speed slightly d: gain steering ability
Answers: 1
Physics, 22.06.2019 05:30, shychk04ot109f
Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.
Answers: 1
Physics, 22.06.2019 07:30, jaquezdaking4919
The slope of a velocity time graph over any interval of time gives the during that interval
Answers: 2
Consider the flow of a fluid down a long cylindrical tube (of radius a). ignore any viscous effects...
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