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Tankless, point-of-use water heaters are commercially available and are claimed to reduce energy usage since water is only heated when needed. Consider an application in a bathroom where hot water is needed to be produced at a rate of 0.2 L/s by raising the temperature from 10 °C to 45 °C. (a) Draw a schematic of the system. Using electric resistance heaters, determine (b) the required power (kW) needed to raise the water temperature and (c) the entropy generation rate (kW/K).
the position of a point p on a line is given by the equation x t sinpi t2. the point starts moving at t0. find the
Kinetic and potential energy effects can be ignored. Evaluate the work required and the heat transfer, each in kW.
an ideal gas of molar mass m is located in a uniform gravitational field whose free fall acceleration is g. a find the
Calculating the mechanical properties of unidirectionally reinforced composites
What is the wear coefficient of the bearing material in m2N-1 ?
Determine the stress in a stay at a given temperature. A steel 'stay' of effective length 5m is fitted in between the walls of a ships refrigerated compartment when the temperature is 18 degrees centigrade.
the collars are pin connected at b and are free to move along rod oa and the curved guide oc having the shape of a
Assume a diffusion coefficient of 1 × 10-8 m2/s, that the concentrations at the high- and low-pressure sides of the plate are 2.4 and 0.6 kg of hydrogen per cubic meter of palladium, and that steady-state conditions have been attained.
Determine the surface temperature of the wire during a windy day when the air temperature is 10°C and the wind is blowing across the transmission line at 50 km/h.
a beam of rectangular cross section is 200 mm deep 100 mm wide and 3 m long. it is simply supported at each end. it has
Using a centrifugal pump, and a flow rate of 60 gal/min, calculate the break hp of the pump using water with a density of 62.4lbm/ft3 and do the same for a nonviscous liquid having a density of 0.85g/cm3.
Need a critical review journal paper about the different types of trucks gap and skirts and boat tails
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