The total charge accumulated by a certain device is given as a function of time by
q(t) = 16.8 t^2 - 1.7 t^4 C.
Find:
(a) What total charge is accumulated at t=2s
(b) What is the maximum charge accumulated in the interval 0 (c) At what rate is the charge being accumulated at t=0.8s?
Use explicit methods (calculus) to determine your answers.21 s.

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]

What is the main objective of using reheat rankine cycle?

Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false