What's the difference between an engineer and a scientist.?

Yes. An engineer basically uses simple scientific principles discovered by scientists to make a tool that greatly aids human work in one field or the other. eg. An electric motor. It works on the scientific principle that current flowing through a loop kept in a magnetic field experiences some torque. An engineer applied this principle and built a motor which led to the invention of inevitable FANS.

An engineer is a person who applies science to a construction project to be built around one or more principles of one or more of the pure sciences. A chemical engineer, for example, would design and build an oil refinery or a plastics plant. A mechanical engineer might design and construct a new type of excavating machine. An electrical engineer might design a hydroelectric power plant.

Being an Engineer, there is one major difference on the high level side, a Scientist often works with new processes that is correct, but the engineer takes those designs to find a process to make them better faster stronger etc. so the saying scientists do the math engineers do the work... is a good way to put it.

briefly; scientist research about nature rules and engineer uses these rules;as you know, our knowledge about nature rules is so limited but we should design "safe" air craft, good quality camera, good car ..... for achievement of necessary factors; here is engineer zone, where scientist can not work properly. fro example about "Fatigue stress" which there is no exact rules for it but engineers use approximate formula for designing. engineer usually use charts, standards, ... for designing and manufacturing; scientist is looking for exact formula, engineer is looking for how much is necessary. I hope you got the point, if any question ask here plz.

The difference?...In the real world, a engineer washes his hands BEFORE AND AFTER a visit to the restroom.

an engineer is a scientist....but a scientist is not neccessary to be an engineer....