Mapa mental
measurements
Conteúdo do mapa
measurements
measuring length
- metre ruler
- precision: 1mm/0.1cm
- avoid parallax errors
- eye level must be placed directly above the length measured
- vernier calipers
- accuracy: 0.01cm
- check for zero errors
- measures short lengths, 1cm - 10cm
- micrometer screw gauge
- meeasuring lengths up to 1cm
- accuracy: 0.1mm
- take note of zero error !
- metre ruler
basic physical quantities, s.i. units
- base quantities
- e.g. length, mass, time
- derived quantities
- e.g. area, volume, speed, density
- base quantities
measurements of time
- s.i. units: seconds
- regular repeating motions: oscillations
- one whole oscillation: period
- period of a pendulum depends on length of pendulum
- if the length is increased, the period of the pendulum increases
- period of a pendulum depends on length of pendulum
- Why take the average of 20 oscillations instead of the timing of 1?
- human reaction time is 0.3 - 0.4 sec late
- why is the angle of displacement of the swing small?
- to keep the oscillation in a single plane
Informações
- Descrição
- - physics - chapter 1 - gce o level syllabus ! - the more important points (those in red) could use more visual diagrams and explaining so u can message me if u want me to add them in, etc ! - all the best studying :)
- Criado por
- quinelle low
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