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Line 3:
Line 3: − Line 129:
Line 128: − + + + + + + + + − 1.000 calorie = 4.184 Joules+ − + + − + + + + − 760 mm Hg = 1 atm+ − + − Atomic mass unit: 1.00 amu = 1.67 x <math>10^{-27}</math>kg+ + + − + − + − + − + − + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Added prefixes, some unit conversions and generally tidied up
==Physical constants==
==Physical constants==
The number in brackets represents the uncertainty in the constant, so that <math>6.626070040(81) \times 10^{-34}</math> has an uncertainty of <math>0.00000000081 \times 10^{-34}</math>.
The number in brackets represents the uncertainty in the constant, so that <math>6.626070040(81) \times 10^{-34}</math> has an uncertainty of <math>0.00000000081 \times 10^{-34}</math>.
{| class="wikitable" style="background: white"
{| class="wikitable" style="background: white"
==Useful Conversions==
==Useful Conversions==
1 atm = 101.1 kPa
===Length===
1 metre = 39.37 inches
1 metre = 3.281 feet
1 kilometre = 0.6213 miles
1 mile = 5280 feet
1 mile = 1760 yards
===Weight===
1 Calorie = 1000 calories
1 kilogram = 35.27 ounce
1 kilogram = 2.205 pounds
760 torr = 1 atm
===Pressure===
1 atm = 101.1 kPa
1 atm = 760 torr
1 atm = 760 mm Hg
===Other===
--------
Atomic mass unit: 1.00 amu = 1.67 x 10<sup>-27</sup> kg
1.000 calorie = 4.184 Joules
Standard Temperature and Pressure (STP): temperature = 273 K and pressure = 1.00 atm
Standard Temperature and Pressure (STP): temperature = 273 K and pressure = 1.00 atm
---------
---------
Relative [[mass (science)|mass]] and [[charge]] of subatomic particles found in [[atom]]s.
{| class="wikitable" style="text-align:left"
{| class="wikitable" style="text-align:left"
|+ Bond Strengths
|+ Atomic particles
|-
|-
! !! Mass !! Charge
! !! Relative Mass !! Relative Charge
|-
|-
| '''Proton''' || 1.67 x <math>10^-27 </math> kg || +1
| '''Proton''' || 1 || +1
|-
|-
| '''Neutron''' || 1.67 x <math>10^-27 </math> kg || 0
| '''Neutron''' || 1 || 0
|-
|-
| '''Electron''' || 9.11 x <math>10^-31 </math> kg|| -1
| '''Electron''' || 1/1837 || -1
|-
|-
|}
|}
==Prefixes==
Prefixes in front of a unit indicate that that unit should be multiplied by a multiple of ten, e.g. Giga is 10<sup>9</sup>, so 1 GPa = 10<sup>9</sup> Pa.
{| class="wikitable"
|-
!Name
!Symbol
!Power
|-
|Pico
|p
|10<sup>-12</sup>
|-
|nano
|n
|10<sup>-9</sup>
|-
|micro
|μ
|10<sup>-6</sup>
|-
|milli
|m
|10<sup>-3</sup>
|-
|centi
|c
|10<sup>-2</sup>
|-
|deci
|d
|10<sup>-1</sup>
|-
|deca
|da
|10<sup>1</sup>
|-
|hecto
|h
|10<sup>2</sup>
|-
|kilo
|k
|10<sup>3</sup>
|-
|mega
|M
|10<sup>6</sup>
|-
|giga
|G
|10<sup>9</sup>
|-
|tera
|T
|10<sup>12</sup>
|}
==References==
==References==
{{reflist}}
{{reflist}}