A two-dimensional reducing bend has a linear velocity profile at section (1). The flow is uniform at sections (2) and (3). The fluid is incompressible and the flow is steady. Find the maximum velocity, V1, max, at section (1).

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A closed system consisting of 4 lb of a gas undergoes a process during which the relation between pressure and volume is pVn 5 constant. The process begins with p1 5 15 lbf/in. 2, 1 5 1.25 ft3/lb and ends with p2 5 53 lbf/in. 2, 2 5 0.5 ft3/lb.

How does a wooden whistle make sound?

One cycle of the power dissipated by a resistor (R=800 Ω) is given by P (t) = 0.03125 W, 0≤t<12.0 sP (t) = 0.03125 W, 0≤t<12.0 s P (t) = 0 W, 12.0≤t<30 sP (t) = 0 W, 12.0≤t<30 s This periodic signal repeats in both directions of time.

Name two types of battery chargers that are used in mechanics

A completely reversible heat pump produces heat at a rate of 100 kW to warm a house maintained at 25℃. The exterior air, which is at 0℃, serves as the source.

A closed system undergoes a process in which work is done on the system and the heat transfer Q occurs only at temperature Tb. For each case, determine whether the entropy change of the system is positive, negative, zero, or indeterminate.

A scientist who is evaluating an ancient human skeleton for signs of vitamin and nutrient deficiency is conducting:

Which of the following is required in order to make a protected left turn A. A left green arrow B. No oncoming traffic C. A left turn only lane D. A large enough gap

At steady state, a cycle develops a power output of 10 kW for heat addition at a rate of 10 kJ per cycle of operation from a source at 1500 K. Energy is rejected by heat transfer to cooling water at 300 K.