I. A Mac Truck starts from rest and reaches a speed of 8.5 m / s in 20 seconds. II. A dune buggy travels for 20 seconds at a speed of 8.5 m / s.

III. A driver sees a deer in the road ahead and applies their brakes. The car slows to a stop from 8.5 m / s in 20 seconds.

A. For each of the three above problems, say whether CVPM applies and explain your reasoning.

B. Choose one of the problems for which CVPM applies. For the problem you selected, draw at least three diagrams and or graphs to illustrate the situation. Choose the diagrams and graphs that you can find most useful.

C. Using the constant velocity particle model, solve for any unknown quantities. Show your work and use units!

Please help, I don’t understand at all! Please show work as well!!!

As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.

He viscosities of several liquids are being compared. all the liquids are poured down a slope with equal path lengths. the liquid with the highest viscosity will

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the