Lecture 1 - 26-1Physics IClass 1Measurements26-2What is...

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Unformatted text preview: 26-1Physics IClass 1Measurements26-2What is Physics?Physicists study the fundamental objects and interactions of nature, and their many-body manifestations. Quantitative - Measurements determine the relevant physical variables. Predictive - If we can predict the behavior of a physical system then we understand the system and its interactions. Mathematical - The parts we understand are framed in appropriate mathematical language to facilitate predictions. This is called a theory. 26-3MeasurementsMeasurements play a vital role in Physics. They identify the most important variables for a particular system - eg. volume of gas, mass of an atom, or length of a solid object. They constrain theory eg. experiments tell us the mass of an object remains constant even when it changes speed, until the speed approaches the speed of light. They provide empirical values for parameters that can't be predicted eg. if I measure the mass of a rock I can predict its motion because I know how gravity works. 26-4...
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Lecture 1 - 26-1Physics IClass 1Measurements26-2What is...

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