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r4 central force
A particle of mass m moves under an attractive central force Kr4 with angular momentum l. For what energy will the motion be circular, and what is the radius of the circle? Find the frequency of radial oscillations if the particle is given a small radial impulse.
A 550-V series motor takes 112 A and operates at 820 r/min when the load is 75 hp. If the effective Ra = 0.1 Q Rf = 100 Q When running at 1,100 r/min with no load connected to the shaft, the motor draws 4 A from the line. Find E and the rotational..
an electric motor of total weight 3330 pounds is mounted on a simply supported beam with an overhang as shown
Calculate the number of vacancies per cubic meter in some metal at 763°C. The energy for vacancy formation is 0.79 eV/atom, while the density and atomic weight for this metal are 4.77 g/cm3 and 88.45 g/mol, respectively.
for each of the following cases determine the internal energy and the enthalpy using the compressed liquid tables and
an optical fiber for telecommunications is made of sio2 glass density 2.20 mgm3. how many si atoms and how many o
a tank has a stirrer that delivers 200 kj of work on 100 kilograms of water at 45 degrees celcus. assume all of the
an automobile radiator may be viewed as a cross-flow heat exchanger with both fluids unmixed. water with a flow rate of
find the diameter given flow rate and pressure what diameter orifice hole d is needed if under ideal conditions the
the wheel on a boat trailer has an angular speed of 1400 rpm when the trailer is towed at 90 kmhr. calculate the
An insulated piston-cylinder assembly containing a fluid has a stirring device operated externally. The piston is frictionless, and the force holding it against the fluid is due to standard atmospheric pressure and a coil spring. The spring constant ..
A company is trying to decide which machine to purchase based on the following information. If they all have 15 years useful life and MARR is 10%, use incremental rate of return analysis in Excel to decide which one is the best choice. Don't forge..
A vessel with a frictionless piston contains 1 ft^3 of a gas at 200 psia. The piston is held in position by applying an external force. Calculate the amount of work done if:
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