![]() Thrown by a major league pitcher a baseball would have about 0.000 000 000 000 007 kg more mass than when it is resting - an amount that is undetectable by today’s standards. Theoretically, a baseball has more mass when thrown than when sitting motionless. In working out his theory of relativity, Einstein found that mass must be related to energy, in essence, mass is "congealed energy." This is certainly a surprising result.įor example, this relationship indicates that if you lift an object from a table and increase its height, you have increased its energy, and its mass increases by a very, very tiny amount. To quote Einstein himself in his 1905 article on relativity published in the Annalen der Physik "The mass of an object is a measure of its energy content." One of the basic laws in physics is the conservation of energy law (the amount of energy in the universe remains constant, only changing in form). Today, physicists see that there is no fundamental difference between mass and energy. Before Einstein’s radical thoughts, mass and energy were thought to be very different things. The equation is known as the mass-energy equivalence relationship. ![]() Energy is a tougher concept, but it is okay to think of it as a property of heat or light. Think of mass as simply the quantity of matter present. In the equation, E = m c 2, E stands for energy, m stands for an object’s mass, and c 2 represents the speed of light ( 186,000 miles per second ) multiplied by itself. From where did all that energy originate? Einstein provided the answer with his famous equation, Robert Oppenheimer, head of the scientists involved in the Manhattan Project, saw the spectacle and quoted Shiva from the Bhagavad Gita: "I am Death, the Destroyer of worlds." The nuclear age had just been born with the test explosion of the first atomic bomb. ![]() steel tower on which the device was mounted was vaporized, and the sand near Ground Zero was fused to radioactive silica glass. A great light filled the skies and a superheated shock wave rushed out from ground zero at hundreds of miles per hour, splintering houses in a fraction of a second. An expectant community of scientists, engineers, and military observers watched the predawn skies near Alamogordo, New Mexico. Exactly what does his famous equation E = mc 2 mean? May 2000 Vocatio Center for Life Calling and CareerĮinstein was voted the person of the century at the end of 1999.Office of Student Leadership & Engagement.
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