Chap 1: Physical Quantities, Units & Measurements Flashcards
Give examples of base quanities
mass, length, time, current, temperature, amount of substance
SI unit of mass
kg (kilogram)
SI unit of length
m (metre)
SI unit of time
s (second)
SI unit of current
A (ampere)
SI unit of temperature
K (kelvin)
SI unit of amount of substance
mol (mole)
‘formula’ of standard form
a x 10^b, where 1 </= a < 10
precision of metre rule
0.1cm/1mm [up to 1m]
precision of measuring tape
0.1cm/1mm [up to several m]
precision of vernier calipers
0.01cm/0.1mm [up to 15cm]
precision of digital calipers
0.001cm/0.01mm [up to 15cm]
precision of micrometer screw gauge
0.001cm/0.01mm [up to 2.5cm]
precision of digital micrometer screw gauge
0.0001cm/0.001mm [up to 2.5cm]
Factor for tera (T)
10^12
Factor for giga (G)
10^9
Factor for mega (M)
10^6
Factor for kilo (k)
10^3
Factor for deci (d)
10^-1
Factor for centi (c)
10^-2
Factor for milli (m)
10^-3
Factor for micro (μ)
10^-6
Factor for nano (n)
10^-9
What is considered as a full oscillation (period)?
X to Y to Z to Y back to X
[X to Z to X]
Define scalar
Physical quantity with only magnitude
Define vector
Physical quantity with magnitude and direction
Give examples of scalar quantities
distance, speed, mass, energy, time
Give examples of vector quanities
displacement, velocity, acceleration, force, weight
Define distance
total length covered regardless of direction
Define displacement
distance measured in a straight line in a specific direction
Give formula for velocity
rate of change of displacement (m/s)
[displacement/time taken]
Give the formula for speed
distance per unit time (m/s)
[distance/time taken]
Symbol for resultant force
FR
