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A 1.2-lb metal bar initially at 2100oR is removed from an oven and quenched by immersing it in a closed tank containing 28 lb of water initially at 620oR. Each substance can be modeled as incompressible. An appropriate constant specific heat value for the water is cw = 1.0 Btu/lb.oR, and an approximate value for the metal is cm = 0.1 Btu/lb.oR. Heat transfer from the tank contents can be neglected. Determine:
a) the final equilibrium temperature of the metal bar and the water, in oR
b) the amount of entropy produced, in Btu/oR
Air enters a turbine at 40 kN/m2, 900 C, and leaves at 10 kN/m2. The flow is reversible and adiabatic. Inlet velocity is quite low and outlet velocity is 150 m/s through a cross-sectional area of 0.20 m2. Calculate the power output in kW.
determine the number of discrete frequencies from the minimum to and including the maximum frequency that will appear
the uniform disk of mass pivots freely on the cart of mass. determine the acceleration of the assembly and the angular
Determine whether laminar-to-turbulent transition occurs in the boundary layer of the fuselage. If transition occurs, where does it occur - Estimate the skin friction drag on the aircraft's fuselage.
1. consider the functionfx 2x4-14x3-60x270xa find the global minimum analytically. evaluate every critical point.b find
data analysis of the breaking strength of a certain fabric shows that it is normally distributed with a mean of 300 lb
(a) Describe how the capacitors are combined. (b) There are three other ways to combine all three capacitors in a circuit. What are the equivalent capacitances for each arrangement?
a 1.5 ton crate is hoisted by three steel wires. each wire is 1/4 in. in diameter and each carries one-third of the load. determine the stress in the wires.
design a polynomial follower motion with asymmetrical rise-fall single dwell and find peak velocity ms acceleration ms2
a team of engineering students is designing a catapult launch a small ball at a so that land in the box . it is known
two kilograms of air within a piston-cylinder assembly executes a carnot power cycle with maximum and minimum
what equal monthly invesmet is required over a 50 year period to achieve a balance of 2600000 in an investment account
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