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A 60-kg woman holds a 9-kg package as she stands within an elevator which briefly accelerates upward at a rate of g/4. Determine the force R which the elevator floor exerts on her feet and the lifting force L which she exerts on the package during the acceleration in-travel. If the elevator supports cables suddenly and completely fail, what values would R and L acquire?
a 3-lb collar can slide on a horizontal rod which is free to rotate about a vertical shaft. the collar is intially held
consider 6.0 kg of austenite containing 0.45 wt c cooled to below 727 degrees celcius 1341 degrees farenheit.a what is
reflection-existing competenciespart-11. reflect on and self-assess your current achievements of engineers
consider a hollow steel sphere of inside radius r110 cm and outside radius of r220 cm. the thermal conductivity of the
the piston of a piston-cylinder device containing gas has a mass of 60kg and a cross-section area of 0.04m. the local atmospheric pressure is 0.97bar, and the gravitational acceleration is 9.81ms. determine the pressure inside the cylinder?
starting from rest the motorboat travels around the circular pathp 50m at a speed v0.8tms where t is in seconds.
a roast is in an oven and weighs 2.25 kg. it is initially at 6 degrees celsius and needs to be heated to 80 degrees
consider a flash chamber operating at steady state as shown in the figure below. refrigerant 134a enters the chamber at
the acceleration of a particle moving along a straight line is inversely proportional to its speed with the constant of
The link BD is a single solid bar with a width x thickness measuring 1.000 in. x 0.50 in. If the pins at A, B and D have a diameter of 0.375 in, determine the average normal stress in link BD when:(b) Fx = 0 and Fy =4.00 kips.
in a quasi-equilibrium process in a closed system a gas expands from a volume of 0.15m3 and a pressure of 120kpa to a
Plot the spectral blackbody emissive power of the sun versus wavelength in the range of 0.01 micro m to 1000 micro m?
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