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Heat is generated in a 1.4-m-long, 0.2-cm-diameter electrical wire that extends across a room which is maintained at 20ºC. The surface temperature of the wire is measured to be 240ºC in steady operation. Also, the voltage drop and electric current through the wire are measured to be 110 V and 3 A, respectively. Disregarding any heat transfer by radiation, determine the convection heat transfer coefficient for heat transfer between the outer surface of the wire and the air in the room.
the ball at is kicked such that 60 . if it strikes the ground at having coordinates 25 -25 determine the speed at
A 90-N force is applied to the control rod AB as shown. Knowing that the length of the rod is 225 mm, determine the moment of the force about point B by resolving the force into horizontal and vertical components.
an electronic instrument is to be isolated from a panel that vibrates at frequencies ranging from 25 hz to 35 hz. it is
derive the intersection coordinates for the first quadrant for the following curves a- modified goodman with langer
What is the discharge revised discharge pressure (guage pressure) of the compressor ? Is the assumption of change in temperature valid for calculating the discharge pressure of the compressor ?
Model the earth as a sphere with a diameter of 8,000 miles. Using 14.7 psia as the average pressure at the earth's surface and ignoring variation in g with altitude, estimate the weight of the earth's atmosphere in lbf, and its mass in lbm.
a hollow shaft has an outsaid diameter of 35 mm and an insaid diameter of 25 mm complute the torsional shear stress in
for a piece of aluminum stock choose a grinding wheel that will grind .050 of stock from it. show the grinding wheel
Consider 6.0 kg of austenite containing 0.45 wt% C, cooled to below 727 degrees Celcius (1341 degrees Farenheit).
a car and its suspension system are idealized as a damped spring-mass system with natural frequency 0.5hz and damping
a bird flies directly into a plate glass window path of bird is perpendicular to plane of window at a location 1.5
the acceleration of gravity g as a function of elevation z above sea level is given by g 32.17 - 3.32x10-6 z where g
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