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Working as a Physicist & Practical Skills
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- 1Peer reviewSending scientific reports to experts in the same area for them to examine and validate before publication
- 2Factors influencing decisions based on scienceThe economy (the cost)
Social implications (how it affects people's lives)
The environment - 3Base quantitiesCurrent
Time
Length
Temperature
Luminous intensity
Mass
Amount of substance - 4Base unitsKelvin (K)
Kilogram (kg)
Metre (m)
Second (s)
Ampere (A)
Mole (mol)
Candela (cd) - 5Unit prefixes less than x\(10^0\)Deci (d) - \(1\)x\(10^{-1}\)
Centi (c) - \(1\)x\(10^{-2}\)
Milli (m) - \(1\)x\(10^{-3}\)
Micro (μ) - \(1\)x\(10^{-6}\)
Nano (n) - \(1\)x\(10^{-9}\)
Pico (p) - \(1\)x\(10^{-12}\)
Femto (f) - \(1\)x\(10^{-15}\) - 6Unit prefixes more than x\(10^0\)Kilo (k) - \(1\)x\(10^3\)
Mega (M) - \(1\)x\(10^6\)
Giga (G) - \(1\)x\(10^9\)
Tera (T) - \(1\)x\(10^{12}\) - 7Evaluating experimental designDoes it test what it's meant to?
Is the method clear enough to follow?
Are all of the variables controlled?
Are the apparatus and techniques appropriate?
Have enough repeats been taken?
Is it safe?
Are there any other ethical considerations? - 8Margin of errorThe maximum difference between your value and the true value
- 9Absolute uncertainty± half of one division on the measuring instrument
± half the range (for a mean)
± half the smallest significant figure
± half the difference between the worst lines (for a gradient) - 10Percentage uncertainty(Absolute uncertainty / measurement) x 100
- 11Combining uncertainties - adding or subtracting dataAdd the absolute uncertainties
- 12Combining uncertainties - multiplying or dividing dataAdd the percentage uncertainties
- 13Combining uncertainties - raising data to a powerMultiply the percentage uncertainty by the power
- 14Valid measurementsThey measure what they're supposed to be measuring
- 15Precise resultsThe range that your repeated data is spread over is small
- 16RepeatableThe experiment can be repeated multiple times and find the same results each time
- 17ReproducibleThe results can be obtained using different experimenters, different equipment and different methods
- 18Accurate resultsThey are really close to the true value
- 19Systematic errorsThey are the same every time the experiment is repeated because they're the result of poor equipment or set-up (e.g. zero errors)
- 20Random errorsErrors caused by unpredictable variations in conditions (i.e. positing of your head when reading a measurement)
- 21Surface area of a sphere\(4{\pi}r^2\)
- 22Volume of a sphere\(\frac{4}{3}{\pi}r^2\)
- 23Coming out of the page
- 24Going into page
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- A level Physics Fichas sobre Working as a Physicist & Practical Skills, creado por Emma KEMP el 23/02/2020.
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- Emma KEMP
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