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Engineering

Consider a 50-mH inductor. a. Express the voltage across the inductor and then evaluate it at t = 0.25 s if iL (t) = 5e - 2t + 3te-2t - 2 A. Be certain to simplify your expression.

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Engineering

An air-conditioning system operating on the reversed Carnot cycle is required to transfer heat from a house at a rate of 755 kJ/min to maintain its temperature at 24°C. If the outdoor air temperature is 35°C, determine the power required to operate this air-conditioning system.

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Engineering

What is the transmission delay (the time needed to transmit all of a packet's bits into the link) ?

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Engineering

River models are used to study many different types of flow situations. A certain small river has an average width and depth of 65 ft and 7 ft, respectively, and carries water at a flow rate of 775 ft3 / s. A model is to be designed based on Froude number similarity so that the discharge scale is 250. At what width and flowrate would the model operate?

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Kaitlynn Trujillo

Engineering

Technician A says that the original equipment manufacturer (OEM) offer scan tools to service their specific line of vehicles. Technician B says that scan tools supplied by aftermarket tool and equipment providers usually provide greater functionality

a. Technician A

b. Technician B

c. Both A and B

d. Neither A nor B

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Engineering

Heat in the amount of 7.5 kJ is added to a closed system while its internal energy decreases by 12 kJ. How much energy is transferred as work? For a process causing the same change of state but for which the work is zero, how much heat is transferred?

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Justin Montgomery

Engineering

Retype the below code. Fix the indentation as necessary to make the program work. if 'New York' in temperatures: if temperatures['New York'] > 90: print ('The city is melting!') else: print ('The temperature in New York is', temperatures['New York']) else: print ('The temperature in New York is unknown.') Sample output with input: 105 The city is melting!

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Engineering

How should employees talk to clients)

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Engineering

The primary difference between integrated/concurrent engineering development and functional/sequential development is: Integrated development spends more money up front to order to save money in later stages. Sequential development is more thorough in addressing development steps. In sequential development, multiple functions co-manage design and testing. Integrated development usually leads to higher sustaining and warranty costs.

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Engineering

A spherical soap bubble with a surface-tension of 0.005lbf/ft is expanded from a diameter of 0.5 in to 3.0 in. How much work, in Btu, is required to expand this bubble

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Engineering

Practice Problem: True Stress and Strain A cylindrical specimen of a metal alloy 49.9 mm long and 9.72 mm in diameter is stressed in tension. A true stress of 376 MPa causes the specimen to plastically elongate to a length of 53.5 mm. If it is known that the strain-hardening exponent for this alloy is 0.1, calculate the true stress (in MPa) necessary to plastically elongate a specimen of this same material from a length of 49.9 mm to a length of 58.2 mm.

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Engineering

An electric generator coupled to a windmill produces an average electric power output of 15 kW. The power is used to charge a storage battery. Heat transfer from the battery to the surroundings occurs at a constant rate of 1.8 kW. Determine, for 8 h of operation

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Engineering

Introduction to gear and gear ratios: If you have two gears of the same size does the output speed increase, decrease, or remain the same constant?

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Engineering

Can a real refrigerator have higher COP than the COP of the Carnot refrigerator?

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Engineering

Once Joe Martin reports his concerns to senior management at corporate headquarters and requests that the Ethicana plant operations be suspended until the faulty equipment, safety and operational issues are corrected it would be unethical for Joe to file a report with the Ethicana Worker Safety and Environmental Protection Agency if the plant continues in operation without repairs.

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