A reference frame is a set of coordinate axes that help describe the position or movement of an object. There are two basic types of reference frames: inertial and accelerating. Inertial frames are those where the coordinate axes appear to follow...

To measure the position and time of an event, we rely upon frames of reference. The frame of reference is an imaginary three-dimensional coordinate grid that allows us to specify where an object is in time and space as compared to other objects in...

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Hard out here for the Orthodox NYU says Borough Park is the most crowded neighborhood in New York, on account of big Orthodox families squeezing into small houses. Meanwhile, prices are so high in Williamsburg that hundreds of local Hassidim are fleeing for the...

Along with the American waistline, the American plate and portion size have grown too. A study at Rutgers University supports earlier research that people today eat bigger servings than they did 20 years ago."People aren't realizing how much they are eating," said Jaime Schwartz, a...

Inside an ordinary-looking trailer in Brooklyn, police have recreated the ramshackle apartment used by terrorists to cook up the explosives used last year in the suicide bombings of the London transit system.Strewn about are empty bottles of hydrogen peroxide and containers of pepper. Filthy hot...

Oh, those holiday pitfalls: a martini and a handful of Chex mix at the office party, Grandma's fruitcake, the plate of gingerbread cookies from your neighbor. Eating all those goodies will definitely cost you.To burn off the calories in one gingerbread cookie, you will have...