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Engineering

Describe the three primary duties for engineer

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Engineering

Q2: The average water height of an ocean area is 2.5 m high and each wave lasts for an average period of 7 s. Determine (a) the energy and power of the wave per unit area and (b) the work and average power output of a wave power plant on this ite with a plant efficiency of 35% and a toltal ocean wave area of 1 km2. Take the density of the seawater to be 1025 kg/m3.

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Engineering

Definition: Part of the Earth's stratosphere which contains relatively high concentrations of O3. It absorbs much of the ultraviolet radiation that would normally reach the surface of the earth.

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Engineering

What is the most important function of any control system?

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Engineering

Why research and development in Maintenance Engineering?

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Engineering

The common-emitter current gains of two transistors are β = 60 and β = 150. Determine the corresponding common-base current gains. (b) The commonbase current gains of two transistors are α = 0.9820 and α = 0.9925. Determine the corresponding common-emitter current gains.

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Engineering

Steam enters a turbine operating at steady state at 600°F and 200 lbf/in^2 with a velocity of 80 ft/s and leaves as saturated vapor at 5 lbf/in^2 with a velocity of 300 ft/s. The power developed by the turbine is 200 horsepower. Heat transfer from the turbine to the surroundings occurs at a rate of 50,000 Btu/h.

a. Neglecting potential energy effects, determine the mass flow rate of steam, in lb/s.

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Engineering

At steady state, a reversible heat pump cycle discharges energy at the rate to a hot reservoir at temperature TH, while receiving energy at the rate from a cold reservoir at temperature TC. (a) If TH = 16°C and TC = 2°C, determine the coefficient of performance. (b) If 10.5 kW, 8.75 kW, and TC = 0°C, determine TH, in °C. (c) If the coefficient of performance is 12 and TH = 27°C, determine TC, in °C.

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Engineering

Against his financial advisor's advice, Frank has decided to invest his money in some risky stocks because he once made

quite a bit of money in the stock market. His decision illustrates

A. the representativeness heuristic

B. overconfidence

C. the availability heuristic

D. confirmation bias

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Engineering

A turntable A is built into a stage for use in a theatrical production. It is observed during a rehearsal that a trunk B starts to slide on the turntable 10 s after the turntable begins to rotate. Knowing that the trunk undergoes a constant tangential acceleration of 0.32 m/s2, determine the coefficient of static friction between the trunk and the turntable.

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Engineering

A stationary conductive loop with an internal resistance of 0.5 Ω is placed in a time varying magnetic field. When the loop is closed, a current of 5 A flows through it. What will the current be if the loop is opened to create a small gap and a 2-Ω resistor is connected across its open ends?

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Engineering

What happens when two identical waves are in inverted phase?

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Engineering

Consider the following grooves, each of width W, that have been machined from a solid block of material. (a) For each case obtain an expression for the view factor of the groove with respect to the surroundings outside the groove. (b) For the V groove, obtain an expression for the view factor F12, where A1 and A2 are opposite surfaces. (c) If H

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Engineering

True centrifugal casting is performed horizontally to make copper tube sections The tubes have a length 1.0 m, diameter 0.25 m, and wall thickness = 15 mm. (a) If the rotational speed of the pipe = 700 rev/min, determine the G-factor on the molten metal.

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Engineering

Think about all the things we have investigated in class so far this semester. Identify three examples of climate-related aspects of the Earth system that we have discussed in the class.

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