# Physics

Einstein's Relativity has opened up whole new worlds of knowledge for the human race. However, the general consensus, that it is the end-all, be-all of physical theory is far from accurate. Einstein himself knew that the theories were incomplete, and even riddled with paradox, if...
 By: Scott Little Gravity and Sunspots.Sunspots are disturbances in the electro-magnetic field surrounding the photosphere, or top surface of the Sun's convection zone. They are believed to be caused by the differential rotation of the outer convective layer. The rotation period of the Sun at the equator...
By: Scott Little
Einstein's Cosmological Constant IntroductionEinstein called the cosmological constant "the worst mistake of my career". He originally developed the constant to balance his field equation of General Relativity. If the universe were static and not inflationary or deflationary (as believed in his time) then gravity would...
By: Sam Beever
THE ONE LINE ANSWER AND MOREIf you simply want to know how gravity works (or what gravity is) according to our best-verified theory in terms of a one-line answer, here it is: Gravity is the effect on the motion of any object (mass or massless)...
By: Ernest Capraro
The hertz is the basic unit of frequency. It was named after Heinrich Hertz, the German physicist, not the car rental company. One hertz is equal to one event per second, or mathematically written, h = 1/s. The event that is being measured can be...
By: Ernest Capraro
1 meter = 3.280839895... feet. You can calculate this amount yourself, as well as other conversions between units if you know a few basic factors.1 inch = exactly 2.54 centimeters, by definition.100 cm = 1 m, also exact, by definition12 inches...
By: Shawn Vilmaire
Electronics has certain basic components that can be found in almost all circuits. The Resistor, the Capacitor, and the inductor are the most common components found in most simple circuits. We will be focusing on the resistor and its equations in a series DC circuit...
By: Ernest Capraro
The basic formula used to define force is: Force = mass x acceleration. Using S.I. units, mass has units of kilograms (kg) and acceleration is meters/second squared (m/s2). That gives force units of kg*m/s2, which are a bit awkward to work with. Instead...
Exploring levitation
By: Ann Albanese
There are so many stories about people who have the ability to rise into the air. Some have been said to be blessed and others were possessed. Levitation is a phenomenon of psychokinesis (PK) in which objects, people, and animals are lifted into the air...
By: Ernest Capraro
A projectile is any object that, once set into motion, has no forces acting upon it other than gravity (and air resistance, though we ignore it whenever possible). A projectile will follow a parabolic path until it hits something (at which point another force acts...

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