C1 Flashcards
Name all the multiples and their symbols
10¹² - tera, T
10⁹ - giga, G
10⁶ - mega, M
10³ - kilo, k
Name all the sub-multiples and their symbols
10^-¹- deci, d
10^-² - centi, c
10^-³ - milli, m
10^-⁶ - micro, μ
10^-⁹ - nano, n
Standard form of 0.01nm in m
0.01 = 1x10^²
0.01nm= 0.01 x 10^–⁹m = 1 x 10-² x 10-⁹m = 1 x 10-¹¹m
Standard form rules
- ranging from 1.00 ~ 10.00
- 3 dp
- eg 1.00 x 10
what is the SI unit of mass, Kg or kg?
kg, the K in Kg is Kelvin
Instrument for time
Stop watch
1) instrument for measuring length
2) precision
3) range
1) measuring tape (steel/cloth), metre rule, digital caliber, digital micrometer
2) measuring tape (1mm), metre rule(1mm), digital caliper (0.01 mm), digital micrometer screw gauge ( 0.001mm)
3) measuring tape ( zero to several metres), metre rule ( zero ~ 1 metre), digital caliper (0~15cm), digital micrometer screw gauge( 0~2.5cm)
cloth measuring tape -> curved surfaces
DMSG -> wire
calipers -> test tube
metre rule -> table
Why is it not recommended to put the object at the zero mark when measuring
Avoid using the zero mark of the metre rule as a start point to take measurements. This is because wear and tear may make it unsuitable for
measuring purposes. The worn end may introduce errors to the readings.
Types of errors + describe
1) systematic error— a type of systematic error is zero error( imperfect alignment of zero marks), due to instrument
2)random error — example is human reaction time, parallax error
parallax error — when eye level is not perpendicular to reading (type of random error)
systematic -> cannot change/ be controlled
Parts of digital caliper + how to use
1) outside jaws - for measuring
Parts of digital micrometer screw gauge + how to use
1)
what is the pendulum proportionate to and independent of
time of period is proportionate to length of bob
it is independent of mass of bob
what are the 7 base quantities
length, mass , time, thermodynamic temperature, electric current, amount of substance
sizes of these common objects:
diameter of earth
height of tall mountain
length of football field
height of chair
width of paper
diameter of wire
size of human cell
size of large molecule
10^7
10^3
10^2
10^-1
10^-3
10^-4
10^-6
10^-9
what is a
1) oscillation in a pendulum
2) period
- from SP to EP same position
- time taken for one complete oscillation
