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A platinum wire is used as a resistance thermometer. The wire resistance was found to be 10 ohm and 16 ohm at ice point and steam point respectively, and 30 ohm at sulphur boiling point of 444.6 C. Find the resistance of the wire at 500°C, if the resistance varies with temperature by the relation Rt Ro (1 +a t Bt2).
The steam from the nozzles of a single wheel impulse turbine discharges with a velocity of 600 m/s at an angle of 20 degrees. The blade wheel rotates at 3000 rev/min and the mean blade radius is 590 mm
a wellinsulated counterflow heat exehanger operates at steady state. in one stream liquid water enters at 10 degree
A perfect gas (methane) undergoes a reversible polytropic process in which the polytrotic exponent is 1.4. 1) Using the first law, arrive at an expression for heat transfer per unit mass solely as a function of the temperature difference (change in T..
steam enters an adiabatic turbine steadily at 3 mpa and 400 degree c and leaves at 50 kpa and 100 degree c. if the
finding the time interval for the motorcyclist to reach a given acceleration if the motorcyclist starts from rest
A 40 kg container is initially at rest and then is pushed by a hydraulic cylinder with a force (kN) = 160 - 10 s. The coefficient of friction between the container and the floor is .26. Give one reason why it may be quickest to use energy methods to ..
A vessel with a frictionless piston contains 1 ft^3 of a gas at 200 psia. The piston is held in position by applying an external force. Calculate the amount of work done if:
Carbon dioxide (CO2) as an ideal gas executes a Carnot power cycle while operating between thermal reservoirs at 450 and 1008F. The pressures at the initial and final states of the isothermal expansion are 400 and 200 lbf/in.2, respectively. The s..
water flows through a pipe ab 1.2 m diameter at 3 ms and then passes through a pipe bc 1.5 mdiameter. at c the pipe
The solid circular aluminium rod has a diameter d=40 mm and can be subjected simultaneously to a torque T in the direction shown and to a tensile axial load P. The modulus of elasticity is E=73 Gpa, and the shear modulus G= 28 Gpa.
A heat pump supplies 40 kW of heat to maintain the inside of a house at 25 degree C in cold winter months when the ambient temperature is 00C. Power required to operate the heat pump cycle is provided by a heat engine cycle which receives 10 kW of he..
a.calculate the enthalpy entropy and gibbs free energy changes when 10g of supercooled liquid silver solidifies
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