Einstein, Albert energy equation

To understand the high energy released in uranium fission, scientists made some theoretical calculations based on Albert Einstein s famous equation The... 

We have seen that light can be treated as particles (photons) with an energy equal to hv. The energy of the photon can also be obtained from Albert Einstein s famous equation relating mass and energy ... 

Albert Einstein publishes the equation E=mc, essentially the mathematical explanation for how matter can be converted into energy. 

The theory proposed by Democritus—that the atom is indestructible—dominated science for centuries until Albert Einstein published his equation in 1905> suggesting mass could be converted into energy. Until then the world s most prominent scientists all insisted the atom could not be broken apart. All things considered, Isaac Newton wrote in 1704, it seems probable to me that God in the beginning formed matter in solid, massy, hard, impenetrable, moveable particles [and] these primitive particles, being solids, are incomparably harder than any porous bodies compounded of them even so very hard, as never to wear or break into pieces. ... 

In the course of his research on electromagnetic waves Hertz discovered the photoelectric effect. He showed that for the metals he used as targets, incident radiation in the ultraviolet was required to release negative charges from the metal. Research by Philipp Lenard, Wilhelm Hallwachs, J. J. Thomson, and other physicists finally led Albert Einstein to his famous 1905 equation for the photoelectric effect, which includes the idea that electromagnetic energy is quantized in units of hv, where h is Planck s con-... 

A hundred years ago it was generally supposed that all the properties of light could be explained in terms of its wave nature. A series of investigations carried out between 1900 and 1910 by Max Planck (1858-1947) (blackbody radiation) and Albert Einstein (1879-1955) (photoelectric effect) discredited that notion. Today we consider light to be generated as a stream of particles called photons, whose energy E is given by the equation... 

Ever since Albert Einstein devised his famous equation, E = mc, we have known that mass and energy are interconvertible. In Einstein s equation, E is energy in kg m /s (J), m is the mass in kg, and c is the square of the speed of light. 

It can be seen that the mass numbers on either side of the equation add up to the same number, 238, and that 92 protons are accounted for in the equation s product and reactant sides. This is a balanced nuclear equation. Actually, some mass is converted into energy, but the amount of mass is very small. From Albert Einstein s equation, E = me2, very little mass, m, is needed to produce a tremendous amount of energy, E, because c is the speed of light, 3 x 108 m/sec. This energy was evidenced when an atomic bomb was exploded over Hiroshima, Japan, during World War II. The fuel for that bomb was uranium-235. 

In 1905, Albert Einstein (1879-1955) published his theory that the mass of a sample of matter is increased as the energy of the sample is increased. For example, a baseball in motion has a very slightly greater mass than the same baseball at rest. The difference in mass is given by the famous equation... 

The answers to these questions can be found in the work of Albert Einstein. As we discussed in Section 12.2, Einstein s theory of relativity showed that energy should be considered a form of matter. His famous equation,... 

In your study of chemical reactions, you learned that mass is conserved. For most practical situations this is true—but, in the strictest sense, it is not. It has been discovered that energy and mass can be converted into each other. Mass and energy are related by Albert Einstein s most famous equation. 

The photovoltaic devices are the most modern. They are semi-conductor or. in other words, solid-state components, and they incorporate the principle of the conversion of radiant energy directly into usable electrical power. The photovoltaic phenomenon is founded upon the basic photoelectric equation of Albert Einstein, namely ... 

With the dawn of the nuclear age in the 1940s, scientists, and then the world, became aware that matter can be converted into energy. In nuclear reactions (Chapter 26), matter is transformed into energy. The relationship between matter and energy is given by Albert Einstein s now famous equation... 

In the early 1900s, Albert Einstein developed a famous equation relating mass and energy in nuclear reactions. Use this equation to explain why nuclear reactions release very large amounts of energy. 

Subsequendy, Planck tried to provide a theoretical basis for his equation. He found that to do so, it was necessary to reject the idea from classical physics that electromagnetic radiation is wavelike and continuous and instead to make the bold assumption that it is particle-hke and discrete. Planck assumed that radiation can occur in discrete packets of energy, which Albert Einstein called quanta. This radical idea is expressed in the equation... 

Shown is a bronze sculpture of Albert Einstein on the grounds of the National Academy of Sciences in Washington, DC. The statue measures 21 feet from the top of the head to the tip of the feet and weighs 7000 pounds. In his left hand, Einstein holds the mathematical equations that represent his three most important contributions to science the photoelectric ejfect, the equivalency of energy and matter, and the theory of relativity. At his feet is a map of the sky. 

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