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The energy consumption associated with a home water heater has two components: (i) the energy that must be supplied to bring the temperature of groundwater to the heater storage temperature, as it is introduced to replace hot water that has been used; (ii) the energy needed to compensate for heat losses incurred while the water is stored at the prescribed temperature. In this problem, we will evaluate the first of these components for a family of four, whose daily hot water consumption is approximately 100 gal. If groundwater is available at 15°C, what is the annual energy consumption associ- ated with heating the water to a storage temperature of 55°C? For a unit electrical power cost of $0.18/kW · h, what is the annual cost associated with supplying hot water by means of
(a) electric resistance heating or
(b) a heat pump having a COP of 3.
The velocity of water in a 2-cm-dia pipe is 20 m/s. If the pipe enlarges to 5-cm-dia, the velocity, in m/s, will be: (show work)
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Determine the force in each member of the truss and state if the members are in tension or compression. Set P1 = 20 kN and P2 = 10 kN - Determine the force in each member of the truss and state if the members are in tension or compression. Hint: Th..
Write a MATLAB program that takes an input of the stress state in 3D. The program should Create the stress tensor. Calculate the principal normal and shear stresses by solving the Eigen value problem.
What is the annual cost of this facility to the community? Assume an interest rate of 6.125% and a useful life of 15 years.
given a lathe turning a mild steel rod 34 in diameter at 764rpm. the depth of cut is set to 0.025in and the power feed
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Design a circuit with a 4-bit input representing the binary number A3A2A1A0. The output should be 1 if the input value is divisible by 3. Assume that the circuit is to be used only for the digits 0 through 9 (thus, values for 10 to 15 can be don't..
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