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The drive to a flywheel is disconnected and in 30 s it is seen to have rotated through 120 revolutions; 30 s later it finally comes to rest. Assuming the angular retardation to be uniform, determine (a) its initial angular velocity, (b) the angular retardation.
A car drives on a curved road that goes down a hill. The car's position is defined by the position vector, r=(-30.0cos(pi/10.0t)]i+[30.0sin(pi/10.0t)]jâ-(Azt)k} ft where Az=7.00ft/s. The image below shows the system projected onto the x-y plane. What..
A force parallelto the x-ax is acts on a particle moving along the x-axis. This force produces potential energy u(x) given by u(x)= a x4. where a = 1.20 j/m4 . What is the force (magnitude and direction) when the particle is at x = - 0.800 m?
steam at 260 c and 1 atm flow through an 8-in. schedule-80 steel pipe at a rate of 10000 lbhr. estimate the value of h
A piston-cylinder device contains 12 kg of saturated R-134a vapor at 3.2 bar. An electric source supplies 8 A current to a resistor within the cylinder for 4 minutes and there is heat transfer of 400 kJ to the system. During these energy interactions..
In a reheat rankine cycle, steam enters the turbine at 4 MPa and 400 C. After expanding to 400 kPa, the steam is reheated again to 400 C, and expands in the low pressure turbine to 10 kPa. If the efficiency of the turbine and the pump is 100% and the..
a charge of -8.1 microc is traveling at a speed of 8.7 106 ms in a region of space where there is a magnetic field. the
Consider an ideal Rankine cycle with a single open feed water heater. The boiler pressure is 800 psia, and the condenser pressure is 2 psia. Steam is extracted from the turbine to heat the feed water at 90 psia. Steam enters the turbine at 1000F.
A ball is projected vertically with a velocity of 40m/s. Three seconds later, a second ball is projected vertically with a velocity of 30m/s. At what point in the air will these balls meet?
Read the case study from chapter four on Harrison elementary school
during a gust of wind the blades of the windmill are given an angular acceleration of 0.2 rads2 where is measured in
calculate the flowrate throught this pipeline and nozzle assuming no frictional energy losses i.e. ideal. calculate the
calculate the change in specific internal energy and enthalpy of air for a process starting at 250 k and ending at 500
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