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Orbiting spheres
Find the shortest possible period of revolution of two identical gravitating solid spheres that are in circular orbit in free space about a point midway between them. The spheres are made of platinum, density 21.5 g/cm3.
saturated r-134a at 310 k flows through a 30-mm-diameter .8-m-long tube. the tube wall temperature is maintained at 290
The machine crank shaft rotates at 800 rpm. If under actual working conditions, the damping reduces the amplitudes of successive vibrations by 30% , find: (i) The force transmitted to the foundation at 800 rpm (ii) The force transmitted to the fou..
50 grams of nickel are melted together with 50 grams of copper, thereby forming 100 grams of a Ni-Cu alloy.
the disk is horizontal and turns so that d thetadt ct about the vertical. forces cause a marble to move in a slot
consider an ideal gas-turbine cycle with two stages of compression and two stages of expansion. the pressure ratio
What is the relationship between processing and structure?
The flow around a model of a turbine blade is investigated. The model is five times larger than the prototype. A maximum pressure of 4 psi is measured at the leading edge, a maximum velocity of fps is measured near the top of the blade, and a small d..
A car has an initial speed of 25 m/s with a constant deceleration of 3m/s^2. Determine the velocity of the car when t=4s. What is the displacement of the car during the 4 second time interval? How much time is needed to stop the car?
consider an ideal vapor-compression refrigeration cycle. the refrigerator employs refrigerant 134a as the working fluid
You are designing a 4-stroke cycle diesel engine to provide a brake power of 300 kW naturally aspirated at its maximum rated speed. Based on typical values for BMEP and mean piston speed, estimate the required engine displacement, and the bore and st..
A single phase step up transformer is used to transform 240VRMS to 2400VRMS. The transformer is operating at its rated power of 1kW (with purely resistive load), with transformer Reqp = 5, and a Xeqp = 4j,
For each of the cases below determine if the heat engine satisfies the first law (energy equation) and if it violates the second law.
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