2.1 physical quantities and units

Question 1

what is ‘checking the homogeneity of physical equations’?

Answer 1

this is when you check that the units of an equation are the same on both sides and therefore the validity of the equation

Question 2

what are S.I base units?

Answer 2

the Systéme International (S.I) includes a set of base units for physical quantities from which lots of other units are derived

Question 3

what is prefix for mili and what it the power of 10 multiple?

Answer 3

m

x10^-3

Question 4

what is prefix for micro and what it the power of 10 multiple?

Answer 4

μ

x10^-6

Question 5

what is prefix for nano and what it the power of 10 multiple?

Answer 5

n

x10^-9

Question 6

what is prefix for kilo and what it the power of 10 multiple?

Answer 6

k

x10^3

Question 7

what is prefix for giga and what it the power of 10 multiple?

Answer 7

G

x10^9

Question 8

what is prefix for tera and what it the power of 10 multiple?

Answer 8

T

x10^12

Question 9

what is prefix for mega and what it the power of 10 multiple?

Answer 9

M

x10^6

Question 10

what is prefix for pico and what it the power of 10 multiple?

Answer 10

p

x10^-12

Question 11

What are the 6 base units and their quantities

Answer 11

Length = meter
Mass = kilogram
Time = second
Electric current = ampere
Temp = kelvin
Amount of substance = mole

Question 12

what is prefix for Peta and what it the power of 10 multiple?

Answer 12

P

X10^15

Question 13

what is prefix for deci and what it the power of 10 multiple?

Answer 13

d

X10^-1

Question 14

what is prefix for centi and what it the power of 10 multiple?

Answer 14

c

X10^-2

Question 15

what is prefix for femto and what it the power of 10 multiple?

Answer 15

f

X10^-15