A machine working on a Carnot cycle operates between 305 K and 260 K. Determine the C.O.P. when it is operated as 1. a refrigerating machine; 2. a heat pump; and 3. a heat engine.

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A: Initial velocityFinal velocityInitial angleFinal angleWeight of the basketball

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Q: Figure 1 of 1 30 40 F2

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A: Esteel=120 GPaμ=.28 εa=100+60×10-6 εb=-200×10-6εc=-180×10-6 θa=0° ,θb=45°,θc=90°

Buckling of columns

The column is described as a vertical member of the structure that carries an axial compressive load, and buckling is a lateral deformation of the column under the application of load.