Measurement📏⚖️ and length Flashcards
Why does science have the ability to make predictions?
It only deals with physical quantities
What is a parallax error?
When you do not have proper eye measurement
How to prevent parallax error
Using set squares, eye level, positions in line and perpendicular to point
WHats the smallest measurememnt Vernier Caliper makes
can measure up to 2 decimal places in a cm (0.1mm)
What is zero error
length of objext different from end point when you don’t start at 0 mark
Whats the smallest measurement Micrometer screw gauge measures
makes use of main and thimble scale to improve precision 0.01mm
What do we use to measure time?
stopwatches
What is a linear scales
Division of the units are equally spaced
What is a non-linear scale
Divisions of the units are not equally spaced
What is a digital scale
Changes byi a fixed minimum amount and can be read off directly from display
What is a analogue scale
estimated from an indicator that moves over a scale
What’s important when recording a measurement?
uncertainties can occur due to limitations of instruments/methods so it is important to measure the uncertainty as well
What is accuracy?
the closeness of a measurement of a physical quantity to the true value
What is precision
closeness of several measurements. Repeated measurements are close precise
