Business

China's Trip.com chief on journey to boost working mothers

The head of Chinese travel giant Trip.com, Jane Sun, is on a mission to propel women through her workforce, spearheading novel approaches such as encouraging babies on business trips and free egg freezing.

Engineering

Drag can lift birds to new heights, researchers find

Future aerial design may owe a nod of thanks to five parrotlets flapping around in an instrumented flight chamber at Stanford University. They revealed that counter to conventional understanding of how animals and planes ...

Business

SoftBank's Yahoo Japan to merge with Line app operator

Japan's Softbank said Monday it will merge its Z Holdings unit—formerly called Yahoo Japan—with popular chat app Line in a multibillion-dollar deal it hopes will help it better compete against big guns in the digital ...

Business

German air force rejects delivery of two Airbus planes

Germany's air force said Wednesday it had refused delivery of two Airbus A400M transport planes over technical faults, saying bolts holding the propellers on some already operational aircraft were loose.

Engineering

Hypersonic research spotlights future flight challenges

Southwest Research Institute engineers are advancing what researchers know about hypersonic flight. A new study presented at the 2019 Joint Army-Navy-NASA-Air Force (JANNAF) Propulsion Meeting describes a series of tests ...

Computer Sciences

Germany shuts down illegal data center in former NATO bunker

German investigators said Friday they have shut down a data processing center installed in a former NATO bunker that hosted sites dealing in drugs and other illegal activities. Seven people were arrested.

Engineering

Report examines how to make technology work for society

Automation is not likely to eliminate millions of jobs any time soon—but the U.S. still needs vastly improved policies if Americans are to build better careers and share prosperity as technological changes occur, according ...

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Force

In physics, a force is any influence that causes an object to undergo a change in speed, a change in direction, or a change in shape. In other words, a force is that which can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate, or which can cause a flexible object to deform. Force can also be described by intuitive concepts such as a push or pull. A force has both magnitude and direction, making it a vector quantity. Newton's second law, F=ma, was originally formulated in slightly different, but equivalent terms: the original version states that the net force acting upon an object is equal to the rate at which its momentum changes.

Related concepts to force include: thrust, which increases the velocity of an object; drag, which decreases the velocity of an object; and torque which produces changes in rotational speed of an object. Forces which do not act uniformly on all parts of a body will also cause mechanical stresses, a technical term for influences which cause deformation of matter. While mechanical stress can remain embedded in a solid object, gradually deforming it, mechanical stress in a fluid determines changes in its pressure and volume.

This text uses material from Wikipedia, licensed under CC BY-SA