Homonyms, Homophones, Homographs? In this Grammar 101 article we explain the difference between commonly confused English words. Improve your grammar here.

Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. The device trades off input forces against movement to obtain a desired amplification in the output force. The model for this is the law of the lever. Machine components designed to manage forces and movement in this way are called mechanisms.[1] An ideal mechanism transmits power without adding to or subtracting from it. This means the ideal machine does not include a power source, is frictionless, and is constructed from rigid bodies that do not deflect or wear. The performance of a real system relative to this ideal is expressed in terms of efficiency factors that take into account departures from the ideal.

Explore the standard sizes for every level of basketball, from high school all the way up through international competition.

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"Break a leg" is an English-language idiom used in the context of theatre or other performing arts to wish a performer "good luck". An ironic or non-literal saying of uncertain origin (a dead metaphor),[1] "break a leg" is commonly said to actors and musicians before they go on stage to perform or before an audition. Though a similar and potentially related term exists in German without theatrical associations, the English expression with the luck-based meaning is first attributed in the theatre in the 1930s or possibly 1920s.[2]

How do college degrees work? Learn more about the types of degrees, the jobs you can get with each degree, and how much you can earn with your education.

1. eating an apple each day can help to keep you healthy 2. eating an apple…