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A thermocouple data logger has a built-in circuit to compensate for the temperature of the connecting board which is used for mounting the thermocouples. A test is to be performed on the circuit by measuring the temperature of the board and the compensating voltage generated internally. If the temperature of the board is measured as 50?F, what should be the compensating voltage, and to what tolerance should it be maintained so that the compensation is accurate within ±0.2?F? Assume iron-constantan thermocouple.
Steel pipe employed for oil drilling operations is made up of many segments joined sequentially and suspended in an oil well. Suppose the pipe used in one such application has an outer diameter of 7.5cm and an inner diameter of 5cm, a density of 7.90..
how many pounds of coal must be burned to keep one 100 watt light bulb lit for one hour. Assume efficiency of the power plant is 35%, the transmission losses are 10% fo the delivered poer, and the heating value of coal is 12,000 BTU/lb
The City of Leadville (dimensions 120x120km ) is characterized by an average daily emission rate of 5000kg/d of particulate lead into the atmosphere from auto exhaust and industrial processes
If the fracture were planar in shape, having an average opening of 2 mm, what would the new value of Hc be?
The concentration of cadmium ion (Cd^+2) in water is 225 mg/L. Will a precipiate be consumed or produced at pH 9.0? Will a precipitate be consumed or produced at pH 7.5
For each of the cases below, assuming all other things unchanged, describe the effect of the following parameter variations on the magnitude of the maximum oxygen deficit in a river. Answer: Increase (+), decrease (-), or remain the same (=).
You are given five data points, yi = f(xi), where i ranges from -2 to 2, and where xi+1 ? xi = ?x is a constant. You are interested in computing the first and second derivative of f at x0.
A cylindrical water tank is suspended vertically by its sides. The tank has a 10-ft diameter and is filled with 20 degree celcius water to a 3-ft depth. Determine the force exerted on the tank bottom
The beam is rigidly attached to a fixed wall at end B. with end D being supported by a rod of length L, Young's modulus E and crosssectional area A. A line load and a couple act on the beam. as shown. Using Castigliano's method. determine the load..
A 20 cubic meter tank contains ultimate BOD at a concentration of 550 mg/L. If the BOD reaction rate constant is -0.42/day, what is the concentration of BOD remaining after 3 days
Points A and B are 1 km apart along a 15 cm new steel pipe. Point B is 20 m higher than A. With a flow from A to B of 0.03 m3 / s of crude oil (S= 0.82) at 10°C (µ =10-2N s/m2 ), what pressure must be maintained at A if the pressure at B is to be ..
what are the factors affecting the hydraulic conductivity?
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