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If an elevator starting from rest accelerates at 10m/s and then decelerates at -1m/s until it reaches the top floor (ignore gravitational acceleration, assume g=0. Plot the corresponding a-t, v-t and s-t graphs.
an elevator weighs 1000lb and carries a load of 600 lbs and decends at 20fts. the cable that supports the elevator has
pole a whose coordinates are 20 degree n 50 degree e is to be rotated about the axes described below. in each case find
a piston-cylinder device contains 0.85 kg of refrigerant-134a at -10 degree celsius. the piston that is free to move
Assume that the center of masses of the upper arm and the forearm acts in the geometric center of the respective body segment, and the center of mass of the hand acts at the same location that the cable is in the hand (given below). If the person is ..
A lap joint needs to be designed using 20-mm diameter bolts to carry a load of 120 kN on the connecting plates. If the shear stress in each rivet is not to exceed 90 MPa, determine the number of bolts needed.
a base for a building column measures 18.0 in by 18.0 in on a side and 12.0 in high. compute the cross-sectional area
a capillary tube has an 8 mm diameter through which liquid fluorine refrigerant r-11 flows at a rate of 0.03 cm3s. the
five kg of r-22 refrigerant at 3 bar and saturated vapor is contained in a closed rigid tank. a process cools the r-22
steam enters an adiabatic turbine at 10 mpa and 800c. it leaves the turbine at 800 kpa and 500c. neglecting kinetic
Show that the spacing between (111) planes in the FCC structure is the same as the spacing (002) planes in the HCP structure. Imagine the atoms to behave as hard spheres.
a liquid food is being heated in a tubular heat exchanger. the inside pipe wall temperature is 110degc. the internal
A plastic was stretched initially from 30 mm to 35 mm and then released at room temperature. The length changes with time were obtained as the following. Assume the Voigt model can be applied for this mechanical behavior.
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