Often an attacker crafts e-mail attacks containing malware designed to take advantage of the curiosity or even greed of the recipients. imagine that the message body amy saw on the e-mail from davey had been "see our managers’ salaries and ssns" instead of "funniest joke you’ll see today." 1. would it be ethical for amy to open such a file? 2. if such an e-mail came in, what would be the best action to take?

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]