Lab a report1. thin layer chromatographya. (true/false) for a given sample, a single tlc spot is an absolute indication of sample purity. explain. b. if a single solvent, such as ethanol (instead of a solvent mixture such as acetic acid/ethyl acetate) were used toelute the samples on the tlc plate, would you expect the rf values to be greater or less than those you recorded

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

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]

How much power could a wind turbine produce if it had the following specifications? cp = 0.45 -d=1.2kg/m3 d=50m v 5m/s