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In each case, calculate the Biot number for the object and indicate whether or not the lumped approximation is valid.
a) A carbon-steel rod of length 2m and diameter 10cm is set in a crossfow of air, which results in a convective heat transfer coecient of 2*( W/m^2K).
b) A teflon sphere of diameter 20cm is dunked in an agitated tank of oil, which results in a convective heat transfer coecient of 20*( W/m^2K).
Block B of the mechanism is confined to move within the slot member CD. If AB is rotating at a constant rate of AB = 3rad/s, determine the angular velocity and angular acceleration of member CD at the instant shown.
the 3-kg slender rod rotated in a vertical plane about a pivot at b. a spring of constant k 300 nm and of unstretched
Steam enters a diffuser at and with a velocity of and exits as saturated vapor at 240 F and 100 ft/s. The exit area of the diffuser is 1 ft2. Determine the mass flow rate of steam and the rate of entropy generation.
a 600 mw coal-fired power plant has an overall thermal efficiency of 38. it is burning coal that has a heating value of
a painter is standing on a work platform that is 27 feet above ground level. for fall protection the workers safety
what are the properties of petrol that it make particularly suitable for the use as fuel in a motor vehicle.
three equal charges of magnitude q6.00 uc are located at three corners of a square edge length d2.9 cm. a negative
an instrument having a resonance frequency of 1414 rads with a damping ratio of 0.5 is used to measure a signal of 6000
Entropy explained in this solution, Liquid H2O at 8 MPa and 40 degrees C is heated reversibly at constant pressure until the temperature reaches 600 degrees C
Determine a) the volume of the tank,b)the final temperature and pressure, and c) the internal energychange of the water.
a 517-kg cannon fires a 16.5-kg projectile with a speed of 265 ms with respect to the muzzle. the cannon is on wheels
Determine the number of storage bits required in the controller memory so that the accuracy of the joint is as close as possible to, but less than, its repeatability. Use six standard deviations as the measure of repeatability.
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