Topic — Construction and validation of physical laws from data, using models, graphs and falsifiability.
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00b
Linked atoms
51 linked atoms.
00b Scientific method
- Worked example: relative uncertainty in a quotient
- Worked example: mean and standard deviation
- Worked example: bouncing ball (semi-log)
- Worked example: error propagation in a product
- Worked example: total bounce time (log-log)
- Falsifiability, confirmation and proof
- Laws and models
- Power law and the log-log graph
- Exponential law and the semi-log graph
- Logarithms: a quick reminder
- Problem: bacteria and the semi-log graph
- Problem: small sample (coin)
- Problem: significant figures
- Problem: significant figures, ranking
- Problem: critiquing the graph, extrapolation
- Problem: manual stopwatch versus photogates
- Problem: human stopwatch
- Problem: calibration curve
- Problem: systematic versus random error
- Problem: exponent from a log-log graph
- Problem: Popper’s falsification
- Problem: linear graph y = kx
- Problem: indeterminacy and method
- Problem: law from pendulum data
- Problem: physical law versus correlation
- Problem: experimental law and hypothesis
- Problem: threshold laws
- Problem: direct or indirect measurement
- Problem: measurement free of disturbance
- Problem: measurement without error
- Problem: Bertrand’s paradox
- Problem: precision versus accuracy
- Problem: precision of three instruments
- Problem: precision required for g
- Problem: designing the measurement of g
- Problem: which graph do you expect (T vs m)
- Problem: how many repetitions to confirm a law
- Problem: ranking instrument uncertainty
- Problem: bounce in log-log
- Problem: reproducibility of the density of oil
- Problem: sum of bounce times
- Problem: Fermi estimate, measurements of g
- Problem: Fermi estimate, school experiments in Italy
- Problem: study on aspirin
- Problem: a single experiment, a single study
- Problem: independent, dependent and confounding variables
- Problem: controlled variables in a gas
- Problem: impact velocity and coefficient of restitution
- Problem: true or false about experimental errors
- Problem: true or false about graphs
- When to use semi-log and when to use log-log