The motion of a bob of a pendulum can be descibed by O= -5 cos(2 t) - 2 sin(2 t) where ө e is the angle made by the bob and pendulum for time, t, in seconds. Write e in the form Rcos (2t-B) gives A 5.39cos (2t-2.76) E B 5.39cos(2t - 158.20°) C ( 5.39 cos(2 t+2.76) ​

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]