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A batch of 20 tons of liquid copper is to be cooled from 2350°F to 2200°F by adding solid copper at 77°F . Assume no heat loss.
(a).What quantity of solid copper should be used?
(b) what temperature would be reached if 2 tons of solid copper were added instead?
the transverse shear v at a certain section of timber beam is 25kn. if the beam has the cross sectio shown in the
1. What is the maximum number of homogeneous phases that can exist at equilibrium for a system involving
determine the maximum velocity to which water can be accelerated by the nozzles before striking the turbine blades.
Why do you think it is important, when using a stroboscope, to start at a very high frequency and slowly reduce the frequency to the point of synchronisation?
a well-insulated turbine operating at steady state with seam enters at 3 mpa 400degc with a volumetric flow rate of 85
A 12 Volt battery is charged by supplying 3 Amps over a period of 6 hours. What is the change of energy stored in the battery if the battery loses 400kJ of heat during charging.
If the surface temperature of the tube is 120°C, determine the average convection heat transfer coefficient of the air and the rate of water evaporation in kg/h.
Consider horizontal pipe carrying water at 70 °F. It is given that the pressure drop over a 100-ft length of 1-in-diameter is 5.0 psig. Determine (a) the Reynolds number, (b) the friction factor, and (c) the flow rate of the water?
refrigerant 134a enters the expansion valve of a refrigeration systems at a pressure of 1.0mpa and a temperature of 34
A truck (T) is tied to a car (C), back bumper to back bumper. To you, the viewer, the truck is on the left, and the car is on the right (side view). Both vehicles are at rest. The rope connecting the two is initially slacked. The truck takes off, and..
steam enters an adiabatic turbine steadily at 10 mpa and 500 degc and leaves at 10 kpa with a quality of 90 percent.
Butane (C4H10) burns completely with 160% of theoretical air at 208C, 1 atm, and 90% relative humidity. Determine (a) the balanced reaction equation.
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