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The pulley system shown is at rest when the motor M starts pulling in rope so as to lift the 119 lb cargo C. For the first second of operating, the motor is able to produce a tension in the rope of the form F0(1+t/T) where F0=40 lb. Neglect the inertia of the pulleys and of the rope. If T=.5 s, use the impulse-momentum principle to determine the speed of the crate after 1 s.
a thermocouple outputs a voltage that is linearyl proportional to temperature. it is used to measure an input signal
consider the function fxx3-2x4 on the interval -22 with h0.25. use the forward backward and centered finite difference
the water level in a sealed tank is 26 m above the ground. the pressure in the air space above the water is 0.25 mpa
A 1m-long metal cylinder of 25cm radius is heated such that the axial temperature distribution at a certain instant of time is T(z)=a+bz+cz2 where a=900K, b=-500K/m and c=150K/m2 . What is the rate of energy change of the cylinder at this instant if ..
a friend asks you to construct the phase diagram for a new binary alloy of a and b. the clues are i a and b are
a room has walls and a ceiling that conduct heat from the room to the cooler outdoors. if the inside temperature is
to study the performance of a race car a high speed camera is positioned at point a. the camera is mounted on a
a glass tube is inserted in mercruy. what is the upward force on the glass as a result of surface effects? constant
what is the primary growth front? what is the secondary growth front? what happens when they approach each other? what
a why is it useful to plot the results on log-log graph paper rather than cartesian graph paperb what are some of the
Two infinite parallel plates are separated by a distance h. The space between them is filled with a Newtonian fluid: density (rho), viscosity (mu). The lower plate is fixed
A cylindrical tank of diameter 1 m has a well-rounded orifice of diameter 2 cm in its base. How long will it take an initial depth of acetone equal to 2 m to drain completely from the tank? How long would it take if the orifice were sharp-edged? If n..
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