2.1 Physical quantities, units and measurements Flashcards
1
Q
What is homogeneity?
A
Base units can be used to check that equations are correct.
2
Q
What are the 7 Base SI units?
A
Length = meter = m, mass = kilogram = kg, time = seconds = s, Amount = mole = mol, temperature = kelvin = k, electric current, ampere = A, luminous intensity = candela = cd.
3
Q
What prefix is 10^-12?
A
Pico (p)
4
Q
What prefix is 10^-9?
A
Nano (n)
5
Q
What prefix is 10^-6?
A
Micro (µ)
6
Q
What prefix is 10^-3?
A
Milli (m)
7
Q
What prefix is 10^3?
A
Kilo (K)
8
Q
What prefix is 10^6?
A
Mega (M)
9
Q
What prefix is 10^9?
A
Giga (G)
10
Q
What prefix is 10^12?
A
Tera (T)
11
Q
What are significant figures?
A
The number of digits in a number that have meaning.
12
Q
What are decimal places?
A
The number of digits after a decimal point.
