True equations of motion include forces caused by shear stress in addition to pr

Question

True equations of motion include forces caused by shear stress in addition to pressure. A shear force differs from a pressure force in that it acts _____ a fluid surface. normal to tangential to against with Consider the following materials: (1) Water at 20 degree C ; (2) Carbon dioxide at 30 degree C and 1 ATM ; (3) Carbon dioxide at 30 degree C and 40 ATM. Which can be considered a fluid? 1 only 1 and 2 1 and 3 2 and 3 1, 2 and 3 A fluid flows steadily through a circular pipe 0f uniform cross-sectional area as shown below If the outlet density of the fluid decreases to 1/2 of its inlet value, what happens to the average fluid velocity? The velocity will not change since mass must be conserved and the flow is Steady

Explanation / Answer

3) Ans: D

A sheer stress force always acts with the fluid surface i.e parallel to the fluid surface

4) Ans: C

CO2 has no liquid state at pressures below 5.1 atm.

Only water and CO2 at 40atm and 30C can be regarded as fluids

5) Answer options not provided

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