Topic 1 - basics

Question 1

pico

Answer 1

x10^-12

Question 2

nano

Answer 2

x10^-9

Question 3

micro

Answer 3

x10^-6

Question 4

milli

Answer 4

x10^-3

Question 5

kilo

Answer 5

x10^3

Question 6

mega

Answer 6

x10^6

Question 7

giga

Answer 7

x10^9

Question 8

Terra

Answer 8

x10^12

Question 9

Name the seven SI units for: length, mass, times, current, temperature, amount of substance and luminous intensity

Answer 9

meter (m), kilogram (kg), second (s), ampere (A), kelvin (K), mole (mol) and candela (cd)

Question 10

What are the two rules for combining uncertainties?

Answer 10

1. multiplying/ dividing two measurements: percentage uncertainties are added.
2. measurements that are subject to powers: multiplied by the power.

Question 11

how do you calculate percentage uncertainties?

Answer 11

(resolution/reading) *100

Question 12

What is a scalar quantity?

Answer 12

A quantity with magnitude only, for example: speed, distance, energy, time, power, charge, current and voltage

Question 13

What is a vector quantity?

Answer 13

A quantity with magnitude and direction, for example: velocity, displacement, forces and acceleration

Question 14

Define speed

Answer 14

rate of change of distance

Question 15

define velocity

Answer 15

rate of change of displacement

Question 16

define distance

Answer 16

distance refers to how much ground an object has covered during its motion

Question 17

define displacement

Answer 17

displacement refers to how far out of place an object is and is the overall change in the objects position