physics unit 2 & 3

Question 1

scalar definition

Answer 1

magnitude

Question 2

vector definition

Answer 2

magnitude + direction

Question 3

distance time graph - gradient =?

Answer 3

speed

Question 4

velocity time graph - gradient =?

Answer 4

acceleration

Question 5

velocity time graph - area =?

Answer 5

distance

Question 6

contact forces

Answer 6

upthrust
compression
tension
lift
thrust
reaction
friction
air/ water resistance

Question 7

non - contact forces

Answer 7

magnetic
electrostatic
weight

Question 8

stopping distance formula

Answer 8

thinking distance + braking distance

Question 9

electromagnetic waves properties

Answer 9

transfer of energy
can travel in vacuum
travel at the speed of light
can be reflected or refracted

Question 10

radio uses / harm for body

Answer 10

broadcasting
communication

Question 11

microwave uses / harm for body

Answer 11

microwave cooking
mobile phones

internal heating go body tissue

Question 12

infra - red uses / harm for body

Answer 12

hight vision
heaters
remote controls

skin burns

Question 13

visible light uses / harm for body

Answer 13

photography
optical fibres

Question 14

ultraviolet uses / harm for body

Answer 14

fluorescent lamps

damage to surface cells

Question 15

X - ray

Answer 15

looking at internal structures

cancer

Question 16

gamma uses / harm for body

Answer 16

medical applications
sterilization of medical applications

cancer
cell death