Body mass index, or BMI for short, is a measure of body weight based on your height. For decades, BMI has been a way to measure whether someone is at a healthy weight. In general, people are ...

Abstract: The report presents differential equations and algorithms for strapdown inertial navigation systems (SINS) designed to determine the apparent, gravitational and relative velocities of a ...

Two mathematicians have proved that a straightforward question — how hard is it to untie a knot? — has a complicated answer.

In January I wrote a piece titled “ 5 Physics Equations Everyone Should Know .” Lots of you weighed in with your own ...

Physicist Albert Einstein famously posited that if he only had an hour to crack a daunting problem, he'd devote 55 minutes to ...

Quantum computers may solve problems beyond supercomputers. A new test helps confirm quantum answers for errors.

The best teachers really grasp the concepts they're educating students on. There's a reason for that and you can harness the memory power of teaching, too.

Stocks: Real-time U.S. stock quotes reflect trades reported through Nasdaq only; comprehensive quotes and volume reflect trading in all markets and are delayed at least 15 minutes. International stock ...

Abstract: The equation of mean-time-to-failure (MTTF) for electromigration has been reevaluated from the viewpoint that in irreversible processes, entropy production is the controlling factor. We have ...

Hours of work are used to determine if workers are entitled to benefits and for how long. Employers have to keep records. For more information on how to report the total hours of insurable employment, ...