S2 L1

Question 1

Define dimension

Answer 1

A property that can be measured

Question 2

examples of dimensions

Answer 2

length [L]
Time [T]
Mass [M]
Electric current [I]
Temperature [θ]

Question 3

Si units of these:
Energy
Power
Electric current
Electrical potential
Resistance
Gray
Sievert

Answer 3

joule J
watt W
ampere A
volt V
ohm Ω
gray Gy
Sievert Sv

Question 4

prefixes symbols and meanings
giga
mega
kilo
centi
milli
micro
nano
femto

Answer 4

G 10^9
M 10^6
k 10^3
c 10^-2
m 10^-3
micro 10^-6
nano 10^-9
femto 10^-15

Question 5

volume of a sphere

Answer 5

4/3 x pi x r^3

Question 6

equation of motion

Answer 6

v = u + at

Question 7

equation for direct and inverse proportion

Answer 7

y = kx
y = k/x

Question 8

equation for exponential relationship

Answer 8

y = kb^x
b = base

Question 9

equation for density

Answer 9

mass/volume

Question 10

gas to solid

Answer 10

deposition

Question 11

solid to gas

Answer 11

sublimation

Question 12

heat energy transfer equation

Answer 12

change in temp = E/km
k= specific heat
e = energy
m= mass

Question 13

heating a pan processes

Answer 13

conduction - heat up handle
radiation - heat lost
convection - heats water in pan