4-2 kJ kg 9 6 In the absence of bearing friction, a winding engine would raise a cage weighing 1000 kg at 10 ms 1, but this is reduced by friction to 9 ms 1. How much oil, initially at 20°C, is required per second to keep the temperature of the bearings down to 70°C? (Specific heat capacity of oil = 2100 J kg¯¹ K¯¹; g = 9-81 ms) (O. & C.) .. Intent boot of vaporisation of a liquid? Explain ht

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