G Estimate of Diffusion Times for the Coronavirus in Blood (30 Points) We want to estimate the average time of diffusion of coronavirus particles in blood, over a distance of 1m: this is like assuming that the coronavirus enters the blood stream at some point in the body and then it travels to other parts, which are approximately 1m apart from the entry point. The size of the coronavirus particle is 0.1 µm in diameter.

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]