Physical Quantities And Measurement Techniques Flashcards
1
Q
3 basic quantities to measure
A
Length, Mass and Time
2
Q
Standard notation
A
Power of… E.g. 2.5 × 10² =250
3
Q
Significant figures
A
the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value
4
Q
Area of a circle
A
πr²
5
Q
Volume of a cylinder
A
πr² × height
6
Q
Meniscus
A
a curve in the surface of a molecular substanc
7
Q
Frequency
A
the number of occurrences of a repeating event per unit of time
8
Q
Scalars quantity
A
A scalar quantity has a magnitude (size) only e.g. temperature
9
Q
Vector quantity
A
Both magnitude and direction are stated in that quantity e.g. velocity
