Relativity

Total Energy

Total Energy Equation 38-40 gives an object’s mass energy (or rest energy) Eo that is associated with the object’s mass m, regardless of whether the object is at rest or moving. If the object is moving, it has additional energy in the form of kinetic energy K. If we  assume that its potential energy is zero, then …

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A New Look at Energy

A New Look at Energy Mass-energy The science of chemistry was initially developed with the assumption that in chemical reactions, energy and mass are conserved separately. In 1905, Einstein showed that as a consequence of his theory of special relativity, mass can be considered to  be another form of energy. Thus, the law of conservation of energy …

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A New Look at Momentum

A New Look at Momentum Suppose that a number of observers, each in a different inertial reference frame, watch an isolated collision between two particles. In classical mechanics, we have  seen that-even though the observers measure different velocities for the colliding  particles-they all find that the law of conservation of momentum holds. That is.they find that …

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Time Dilation

Time Dilation Suppose now that two events occur at the same place in S’ (so .1x’ = 0) but at different times (so .1(‘ “* 0). Equation 38-22 then reduces to     This confirms time dilation. Because the two events occur at the same place in S’, the time interval t!.(‘ between them can be measured …

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