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A computer code is being developed to analyze a 12.5-mm-diameter, cylindrical sensor used to determine ambient air temperature. The sensor experiences free convection while positioned horizontally in quiescent air at T∞ = 27°C. For the temperature range from 30 to 80°C, derive an expression for the convection coefficient as a function of only ?T - Ts - T∞, where Ts is the sensor temperature. Evaluate properties at an appropriate film temperature and show what effect this approximation has on the convection coefficient estimate.
In terms of heat treatment and the development of microstructure, what are two major limitations of the iron-iron carbide phase diagram?
A natural rubber compounded is proposed for a bushing application. Stress analysis indicates that the structure requires a tensile modulus of 5 Mpa. In terms of percentage, how much dicumyl peroxide must be used in the compound to achieve the desired..
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).
10g of steam at l00°C and a pressure of one atmosphere condensing into water at the same temperature and pressure. (The latent heat of vaporization of water is 22571 Jg^-1).
prepare an approximate plot of temperature versus concentration
find the speed of the motor. Neglect the brush-contact drop.
Which of the transistor currents is always the largest? Which is always the smallest? Which two currents are relatively close in magnitude?
For each of the following equations, determine the order of the equation and then test it for time invariance
You have two identical containers at a fixed temperature. In one you have water vapor (H2O) and in the other you have carbon dioxide (CO2). In the high-temperature, classical limit for vibrations and rotations, meaning that (rotation angle
When burnt , the flue gas issuing out of the furnace at 545 oc analyses on dry basis as CO2 =14.5 % , O2 = 4.7%, N2 = 80.8 % , Other relevant data are- Gross C.V. of coal =28000 kj /kg , ambient temperature = 15oc
The cable is made of a superconducting material ( σ = ∞), is 10 km long and operates at 480 V. Because of a leak, seawater ( σ = 4 S/m) entered the cable, filling the space between the conductors.
When the J and K inputs of a JKFF are tied to logic 1, this device is known as a divide-by-2 counter. Complete the timing diagram shown in Figure P6.1.49 for this counter.
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