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Drift velocity and electric field intensity in conductors. A copper conductor with conductivity σ = 5.7 X 107 S/m carries a current of 10 A. The conductor has a diameter of 2 rom. Calculate:
(a) The electric field intensity inside the conductor.
(b) The average drift velocity of electrons in the conductor assuming a free electron density of 8 x 1028 electronslm3.
An evaporator is used to concentrate 20 wt % NaOH solution entering at 150°F to a 45 wt% NaOH solution exiting at 200°F. What is the pressure in the vapor space of the evaporator
Into a barrel containing 33.2 bbl (US) of water containing 0.0012 mol/L of a blue dye you pour V2 yd3 of water containing 8.91 M of the dye. The final concentration of the dye in the barrel is 7.91 mol/m3 after it's well-mixed. What is V2 is yd^3?
An insulated cylinder fitted with a weightless latched piston contains steam at 5 bar, 300 °C. The piston is unlatched and the steam expands against ambient air at P = 1 bar. The temperature of steam in the final state is 142 °C. Determine the ene..
The reaction A + B ? R is a zero order with respect to both A and B. Compute the values for CA and CB at t = 15 seconds if the specific rate of reaction is 0.01 mole/L-s and initial concentration of A and B are both 0.2 moles/L.
A 1 m^3 isolated chamber with rigid walls is divided into two compartments of equal volume. The partition permits transfer of heat. One side contains a nonideal gas at 5 MPa and 300 K and the other side contains a perfect vacuum.
Determine the properties of the gas-vapour mixture using suitable models. Derive psychrometric relationships for the gas-vapour mixture and create the associated
If the higher-pressure steam expands in a turbine of 78% efficiency and the lowerpressure steam is compressed in a machine of 75% efficiency. Make a thermodynamic analysis of this process.
Determine the synchronous speed in revolutions per minute and the useful torque in new ton meters of a 200-hp, 60-Hz, six-pole synchronous motor operating at its rated full load (1 hp ≅ 746 W).
1a / state the formula giving flowrate (qv) in terms of valve flow coefficient, pressure drop across the valve and relative density of fluid. State the units of the variables in the formula.
A 0.1025-g sample of copper metal is dissolved in 35 mL of concentrated HNO3 to form Cu2 ions and then water is added to make a total volume of 200.0 mL
The pressure drop allowance for each stream is 100 kN/m2 . Design a suitable exchanger for this duty.
Also sketch the power triangles before and after the addition of C, and find the overall current drawn from the supply.
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