quick practical revision Flashcards
limitations, improvements and uncertainties
two readings are not enough to draw a valid conclusion
take more readings and plot a graph
take more readings and plot a graph
two readings are not enough to draw a valid conclusion
value of a physical quantity is small so the % uncertainty is large
make the value of the quantity larger e.g. time more oscillations
make the value of the quantity larger e.g. time more oscillations
value of a physical quantity is small so the % uncertainty is large
movement/oscillation of something is affected by the wind
use a wind shield when carrying out the experiment
use a wind shield when carrying out the experiment
movement/oscillation of something is affected by the wind
difficult to determine the start and end of an oscillations/movement e.g. bouncing tennis ball as it moves too fast
use a video camera with a playback feature and timer then play back the video viewing it frame by frame
use a video camera with a playback feature and timer then play back the video viewing it frame by frame
difficult to determine the start and end of an oscillations/movement e.g. bouncing tennis ball as it moves too fast
difficult to release something without applying a force
use tongs or a mechanical hand
use tongs or a mechanical hand
difficult to release something without applying a force
heat loss through the sides & bottom of beaker/ container
use polystyrene container or insulate the beaker
use polystyrene container or insulate the beaker
heat loss through the sides & bottom of beaker/ container
measuring instrument isnt precise enough e.g. metre rule
use a vernier callipers/ micrometer screw gauge
use a vernier callipers/ micrometer screw gauge
measuring instrument isnt precise enough e.g. metre rule
length/ diameter/ thickness of _____ isnt uniform
measure the length around/along the _____ and calculate the mean
measure the length around/along the _____ and calculate the mean
length/ diameter/ thickness of _____ isnt uniform
oscillations doesnt occur in 1 plane
trap apparatus so to make sure the oscillation only occurs in 1 plane e.g wooden rod, drill through and put a nail
trap apparatus so to make sure the oscillation only occurs in 1 plane e.g wooden rod, drill through and put a nail
oscillations doesnt occur in 1 plane
diffuclt to keep the e.g. ruler vertical
clamp it / use a clamp
clamp it / use a clamp
diffuclt to keep the e.g. ruler vertical
friction at the pulley
apply oil to lubricate the pulley
apply oil to lubricate the pulley
friction at the pulley
resistance of contacts
clean the contacts
uncertainty for vernier callipers
0.1mm or 0.01cm
