Measurement Flashcards
What is a physical quantity
A physical quantity is a quantity that can be measured. It consists of a numerical magnitude and a unit.
What is a vector quantity
Vector Quantities are Physical quantities that have
magnitude and direction, E.g. displacement, weight,
acceleration and force.
What is a scalar quantity
Scalar Quantities are Physical quantities that have
magnitude only. E.g. mass, temperature, time, speed and
distance.
Prefix (tera-) answer: factor, symbol
10^12, T
Prefix (giga-) answer: factor, symbol
10^9, G
Prefix (mega-) answer: factor, symbol
10^6, M
Prefix (kilo-) answer: factor, symbol
10^3, k
Prefix (deci-) answer: factor, symbol
10^-1, d
Prefix (centi-) answer: factor, symbol
10^-2, c
Prefix (milli-) answer: factor, symbol
10^-3, m
Prefix (micro-) answer: factor, symbol
10^-6, u (with tail)
Prefix (nano-) answer: factor, symbol
10^-9, n
Measuring Instruments (Tape Measure) answer: suitable for measuring-
A few metres
Measuring Instruments (Metre rule) answer: suitable for measuring-
Several centimetres
Measuring Instruments (Vernier Callipers) answer: suitable for measuring-
A few centimetres
Measuring Instruments (Micrometre Screw Gauge) answer: suitable for measuring-
A few millimetres
How to reduce random error
Repeat the measurement and take the average value of the measurements
How to correct zero error
The 0cm mark on the ruler may not be exactly at the end of the ruler
What is an oscillation and what is the time taken known as. Also, what is it dependent on
Each to-and-fro motion is one oscillation, the time taken for one complete oscillation is known as the period, The period is dependent on the length
