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(a) Water flows through a tube at a rate of 7.5 kg/min while heat is added to it at a rate of 4.5 kW. If water entered at 20 degrees celcius, determine the exit temperature. Assume the pressure remains constant at 1 atm throughout.
(b) Repeat the exercise but assume a heat addition rate of 45 kW instead. What is the exit state of the water.
The coefficient of rolling resistance can be taken to be a constant for all speeds, equal to 0.008. If the cyclist is coasting down a 6% grade, what is the maximum speed attained
What is your recommendation for the maximum size of coarse aggregate for the following situation? A continuously reinforced concrete pavement cross section contains a layer of No. 6 reinforced bars at 15.24 cm centers,
When water at 70C flows through a convergingsection of pipe, the pipe pressure decreases in the direction of flow. Estimate the minimum absolute pressure that can develop without causing cavitation.
The solid circular disk of uniform thickness is released from rest on the 60-degree incline. Calculate the angular velocity w of the cylinder and the magnitude v of the velocity of its center C after it has moved 10 ft down the incline.
The dimensionless henry's constant for TCE at 25 degrees celsius is 0.4. A sealed glass vial is prepared that has an air volum of 4mL overlying an aquesous volume of 36mL.
An equal-tangent crest curve connects a +2% initial grade with a -1% final grade, and is designed for 55mi/h. The station of the PVI is 233 + 40 with elevation 1203 ft. What is the elevation of the curve at station 234+00
A large drainage channel has a trapezoidal cross section with a bottom width of 75 feet and bank side slopes of 4:1 (H:V). If the normal depth of flow is 25 feet, compute the normal flow rate through the channel (Q in cfs).
A construction company requires to know how much of additives A and B to use to prepare concrete to be used in a freezing environment (northern location). The concrete mix should contain a minimum concentration of nitrate and sulphate.
Determine the Modulus of Elasticity of Concrete by the ACI formula for a concrete cylinder that has a unit weight of 120pcf (1920kg/m^3) and a compressive strength of 3000 psi (21MPa).
Starting from x = 0 with no initial velocity, the acceleration of a race car is defined by the relation a = 6.8e-0.00057x, where a and x are expressed in m/s2 and meters, respectively. Determine the position of the race car when v = 30 m/s.
A hydraulic cylinder must produce a minimum force of 3 kN for a pressure of 800 kPa. What minimum diameter piston is required
Calculate the pH of a buffer solution prepared by mixing 8.5g KH2PO4 with 43.5g K2HPO4 in 1 liter of water (this is actually the composition of the dilution water used in a BOD test. Follow the same procedures you have been using for previous acid/..
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