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A skier starts from rest on the 40° slope at time t = 0 and is clocked at t = 2.58 s as he passes a speed check-point 20 m down the slope.
Determine the coefficient of kinetic friction between the snow and the skis Neglect wind resistance.
Consider 6.0 kg of austenite containing 0.45 wt% C, cooled to below 727°C (1341°F). (a) What is the proeutectoid phase? (b) How many kilograms each of total ferrite and cementite form?
a sample of tungsten w contains an edge dislocation. w can be treated as elastically isotro pi c and the dislocation is
It takes 15 revolutions of the screws for the full range motion necessary to unload/load a work piece. The DC motor constant, KM, is 0.6 rev/V/s and there is a 20 Volt power supply. Assuming a constant proportional control gain, KP of 4 volts/rev, ho..
wetting of some metallic surfaces can be inhibited by means of ion implantation of the surface prior to its use thereby
Air exerts a pressure of 900KPa within a 0.45 cubic meter container of fixed volume. It is cooled such that the pressure falls to 3.25bar. The temperature of the air is then measured and was found to be 285C. Determine the mass of the air, the initia..
A central heating system has a 60 W fan used to circulate air through the building ducts. A previous flow analysis showed that the fan needs to raise the air pressure by 50 Pa to maintain proper flow through the ducts. The fan is located in a horizon..
An octave is defined as a doubling of the frequency. The claim is made that a low-pass Butterworth filter of order n has a roll-off (attenuation) of 6n dB/octave. Calculate the gain in dB for a second-order filter for the cut-off frequency itself, an..
the free convection heat transfer coefficient on a thin hot vertical plate suspended in still air can be determined
an external moment of 500 n-m is applied to the composite plate in clockwise direction as shown. the square plate is
refrigerant 134a at a rate of 0.8 lbs enters a compressor operating at steady state as saturated vapor at 30 psia and
Water is contained in a 0.2 m3 vessel at 200 C. The mass of water in the vessel is measured to be 2 kg. Determine (a) the pressure in the vessel, (b) the enthalpy, h, of the water in kJ/kg, (c) the mass and volume of vapor in the vessel.
The following turbulent-flow velocity data u(y), for air at 75°F and 1 atm near a smooth flat wall, were taken in the University of Rhode Island wind tunnel:
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