# Latest Introductory physics Stories

A popular theory that emphasizes dark energy as a contributor to the acceleration of the universe’s expansion does not fit newly obtained data with regards to one fundamental constant – the proton to electron mass ration – claims a University of Arizona astronomy professor.

A new study by physicists at the Ludwig Maximilians University and the Max Planck Institute of Quantum Optics describes the creation of a new atomic gas in the laboratory that has negative Kelvin values.

The Woodward effect is one of many effects that can be derived from the framework of general relativity. The mathematics can be somewhat opaque and so it can be difficult to determine if the resulting effect is a physical, or purely mathematical construct.

The U.S. Naval Research Laboratory Spacecraft Engineering Department's space robotics research facility has gotten its hands on a tool to help emulate inertia in space.

Isotech Inc., has introduced a new line of lightweight, non-magnetic linear ball slides designed for motion applications that are sensitive to magnetic influence.

Friction is a key phenomenon in applied physics, whose origin has been studied for centuries.

## Latest Introductory physics Reference Libraries

General Relativity -- General Relativity is the common name for the theory of gravitation published by Albert Einstein in 1915. According to general relativity the force of gravity is a manifestation of the local geometry of spacetime. Although the modern theory is due to Einstein, its origins go back to the axioms of Euclidean geometry and the many attempts over the centuries to prove Euclid's fifth postulate, that parallel lines remain always equidistant, culminating with the...

Escape Velocity -- An escape velocity is the minimum speed at which an object without propulsion can move away from a source of a gravitational field indefinitely if there is no friction. This definition may need modification for the practical problem of two or more sources in some cases. In any case, the object is assumed to be a point with a mass that is negligible compared with that of the source of the field, usually an excellent approximation. It is commonly described as the speed...

- Sleep; the state or condition of being asleep.
- The state or condition of numbness of a part due to pressure on a nerve: as, the obdormition of a limb.