P(s) is a transfer function of a dynamic plant with two stable poles and no zero. The unit-step response of this plant is oscillatory with a damping ratio of 0.4 and damped natural frequency of 4 rad/sec. The unit step response converges to 8. Determine P(s). Using MATLAB, plot the unit-step response of P(s) versus time.

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]