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1 chapter · 11 notes · all free

1. Nature of the Physical World and Scope of PhysicsA brick and a mango tree are both part of the world, so what one question separates them?
2. Concept, Law, Principle, Postulate, Hypothesis and TheoryAre Boyle’s law and Einstein’s theory the same kind of thing? Tell them apart by definition, not by name.
3. Physics and the World of Other Sciences and KnowledgeAn X-ray, a scoreboard and an e-mail: which one is a gift of physics?
4. Space, Time and Mass in PhysicsNewton said a ruler is always the same length. Einstein said motion shrinks it. Who is right?
5. Fundamental and Derived UnitsThe metre stands alone, the newton does not. Can you tell which unit depends on which?
6. (part) Dimensions and Dimensional EquationsCan you tell if an equation is right without putting in a single number?
7. Conversion, Checking and Forming EquationsForgot the formula? Dimensions can rebuild the pendulum's, but why can they never give the constant?
8. Principle of Measurement and History of ObservationIn “10 kilograms”, which part is the number and which the unit? And who wrote the Principia, and when?
9. Errors in MeasurementThree readings agree almost perfectly, yet the balance is wrong. What separates accurate from precise?
10. Error Propagation, Significant Figures and RoundingA small slip in timing a pendulum, and the error in g doubles. Why does the power become the multiplier?
11. Screw Gauge, Spherometer and BalanceA negative zero error is added back and a positive one is subtracted. Why?

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