physical quantities & measurement techniques Flashcards
1
Q
calibrated
A
should agree closely w/ a standard or agrees when a correction has been applied
2
Q
precise
A
when several readings are close together when measuring same value
3
Q
to measure curved lines/ circumference of cylindrical object
A
lay a thread along the line
4
Q
meniscus
A
- curved upper surface of liquid
- caused by surface tension
5
Q
units of length
A
1 decimetre = 0.1 m
1 millimetre = 0.001 m
1 micrometre = 0.000 001 m
6
Q
units of volume
A
1 cubic centimetre = 0.000 001 m^3
1 cubic decimetre = 0.001 m^3
7
Q
analogue clock
A
- has hands
- only measure time to nearest sec
8
Q
digital clock
A
- displays numbers
- records time to a precision of at least one hundredth of a sec
9
Q
for measuring time taken for a rapidly moving object to move between 2 points…
A
light gate connected to an electronic gate
10
Q
oscillation
A
a repetitive motion or vibration
11
Q
period
A
time it takes for an object to return to its original position
