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The uniform panel door weighs 60 lb and is pre-vented from opening by the strut C, which is a light two-force member whose upper end is secured under the door knob and whose lower end is attached to a rubber cup which does not slip on the floor. Of the door hinges A and B, only B can support force in the vertical z-direction. Calculate the compression C in the strut and the horizontal components of the forces supported by hinges A and B when a horizontal force P = 50 lb is applied normal to the plane of the door as shown.
A car is to be hoisted by elevator to the third floor of a parking garage, which is 36 ft above the ground. If the elevator can accelerate at 0.7 ft/s2, decelerate at 0.2 ft/s2, and reach a maximum speed of 8 ft/s, determine the shortest time to make..
a droplet of water diameter 100 um is falling through 20oc air at the terminal velocity of 0.298 ms. the relative
What are phase-change materials and how do they work and what are the advantages of PCMs over other thermal energy storage systems?
how would you use a pulley system with one rope to pull at a single item at two points simultaneously?the free ropes of
a vat holds 2.25103 kg of a 22.0 solution of ethylene glycol and water. how much must be drained from the tank and
several methods have been tried to eliminate the droplets of condensed steam that hit and erode the last-stage blades
the 5-kg block is falling downward at v1 2 ms when it is 8 m from the sandy surface. determine the average impulsive
a water system is designed to produce drinking water in arid climates. it takes air at 90 degrees f 29.7 inhg and 95
Determine the normal force R between the wheel and the horizontal surface. Neglect the weight of the horizontal shaft.
2000 kgh of milk is sterilized in a steam infusion sterilizer steam and milk directly contact. the milk is heated to
For a steel alloy it has been determined that a carburizing heat treatment of 9-h duration will raise the carbon concentration to 0.38 wt% at a point 1.4 mm from the surface. Estimate the time (in h) necessary to achieve the same concentration at a 6..
a carnot engine operates between two reservoirs maintained at 400 degrees celcius673.15k and t2 respectively. the heat
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