How do you do efficiency?

While cars are definitely a faster way of transportation compared to bicycles, bicycles would probably be more efficient. Cars are very expensive and you must pay for gas. You also have to account...

efficiency is defined as the concept of mechanical advantage and velocity ratio.

Is a measure of time, cost and effort. Measures of an efficient information system include its productivity, processing time, operational costs and level of automations. Measures of an efficient...

using resources in such a way as to maximize the production of goods and services

It is efficiency of the propelling device in converting the applied torque into useful thrust. In an IDEAL propeller the freestream velocity and the slipstream velocity should be same. The higher the...