The motor draws in the cable with an acceleration of 3 m/s2. The beam has a uniform mass of 30 kg/m , and the crate has a mass of 200 kg Neglect the mass of the motor and pulleys. Determine the reactions at supports A and B.

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]