You row a boat perpendicular to the flow of a river, which is flowing with a velocity with a magnitude of 15 m/s. The boat, in still water, is capable of moving with a velocity with a magnitude of 6.5 m/s. What is the resultant velocity of the boat?

Avehicle has an oil leak that is causing the entire oil pan to be wet, but inspection reveals no exact source after cleaning off the oil residue. technician a says to install a fluorescent dye in the crankcase and operate the engine, then re-inspect for leaks with a special light (black light). technician b says the oil leak may be coming from a source at the top of the engine, such as a valve cover gasket. who is correct?