Find the center of mass of the snowman
A snowman is made of three spheres of radii R,2R,3R with the largest sphere on the bottom and the smallest sphere on top. Find the center of mass of the snowman.
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The weight of all other links is negligible. At the instant shown, determine the torque required from the motor to operate the compressor.
Oxygen gas is compressed in a piston-cylinder device from an initial state of 0.8 m3/kg and 25oC to a final state of 0.1 m3/kg and 287oC. Determine the entropy change of the oxygen during this process. Assume constant specific heats.
The gas-turbine powered Plymouth ion built in 1960 had a turbine inlet temperature of 926 C, a pressure ratio of 4,and inlet conditions of 15 C, 0.1 MPa. solve using cold and standard-air assumptions:
During the process the temperature of the water changes from 10 degree C to 15 degree C. Compute the change in specific internal energy, specific enthalpy, and specific entropy.
Steam enters an adiabatic turbine steadily at 7 MPa, 500 degrees C and leaves at 100 kPa. If the mass flow rate is 6.2 kg/s and the isentropic efficiency is 77%, determine the power output of the turbine in megawatts.
A simple harmonic oscillator of amplitude 6.4mm and frequency 80 Hz is attached to the left end of a spring of linear mass density 8g/m held at tension 110N. How much energy is delivered by the oscillator to the string in one minute?
A circuit containing a 9.2 H inductor has an alternating current supplied to it. If Irms is 3.9 A and Vp is 48 V, find the frequency of the signal. Express the answer with two decimal places.
Why does the temperature rise? Determine the initial volume. Determine the work done during the process Determine the heat transfer during the process.
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The purpose is to examine the psychological factors affecting how teenagers in an impoverished urban area spend their time outside of school using:
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