Difference between revisions of "Physical Constant"
(Created page with "==Key Stage 5== ===Meaning=== A '''physical constant''' is a quantity which is believed to have the same value at all points in space and time. ===About Physical Constants===...") |
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| style="height:20px; width:100px; text-align:center;" |Units | | style="height:20px; width:100px; text-align:center;" |Units | ||
|- | |- | ||
− | | style="height:20px; width:300px; text-align:center;" |Elementary Charge | + | | style="height:20px; width:300px; text-align:center;" |[[Elementary Charge]] |
| style="height:20px; width:50px; text-align:center;" |<math>e</math> | | style="height:20px; width:50px; text-align:center;" |<math>e</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>1.60\times10^{-19}</math> | | style="height:20px; width:100px; text-align:center;" |<math>1.60\times10^{-19}</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>C</math> | | style="height:20px; width:100px; text-align:center;" |<math>C</math> | ||
|- | |- | ||
− | | style="height:20px; width:300px; text-align:center;" |Rest Mass of a Proton | + | | style="height:20px; width:300px; text-align:center;" |Rest Mass of a [[Proton]] |
| style="height:20px; width:50px; text-align:center;" |<math>m_p</math> | | style="height:20px; width:50px; text-align:center;" |<math>m_p</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>1.67\times10^{-27}</math> | | style="height:20px; width:100px; text-align:center;" |<math>1.67\times10^{-27}</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>kg</math> | | style="height:20px; width:100px; text-align:center;" |<math>kg</math> | ||
|- | |- | ||
− | | style="height:20px; width:300px; text-align:center;" |Rest Mass of a Neutron | + | | style="height:20px; width:300px; text-align:center;" |Rest Mass of a [[Neutron]] |
| style="height:20px; width:50px; text-align:center;" |<math>m_n</math> | | style="height:20px; width:50px; text-align:center;" |<math>m_n</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>1.68\times10^{-27}</math> | | style="height:20px; width:100px; text-align:center;" |<math>1.68\times10^{-27}</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>kg</math> | | style="height:20px; width:100px; text-align:center;" |<math>kg</math> | ||
|- | |- | ||
− | | style="height:20px; width:300px; text-align:center;" |Rest Mass of an Electron | + | | style="height:20px; width:300px; text-align:center;" |Rest Mass of an [[Electron]] |
| style="height:20px; width:50px; text-align:center;" |<math>m_e</math> | | style="height:20px; width:50px; text-align:center;" |<math>m_e</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>9.11\times10^{-31}</math> | | style="height:20px; width:100px; text-align:center;" |<math>9.11\times10^{-31}</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>kg</math> | | style="height:20px; width:100px; text-align:center;" |<math>kg</math> | ||
|- | |- | ||
− | | style="height:20px; width:300px; text-align:center;" |Gravitational Constant | + | | style="height:20px; width:300px; text-align:center;" |[[Gravitational Constant]] |
| style="height:20px; width:50px; text-align:center;" |<math>G</math> | | style="height:20px; width:50px; text-align:center;" |<math>G</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>6.67\times10^{-11}</math> | | style="height:20px; width:100px; text-align:center;" |<math>6.67\times10^{-11}</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>Nm^2kg^{-1}</math> | | style="height:20px; width:100px; text-align:center;" |<math>Nm^2kg^{-1}</math> | ||
|- | |- | ||
− | | style="height:20px; width:300px; text-align:center;" |Permittivity of Free Space | + | | style="height:20px; width:300px; text-align:center;" |[[Permittivity of Free Space]] |
| style="height:20px; width:50px; text-align:center;" |<math>\varepsilon_0</math> | | style="height:20px; width:50px; text-align:center;" |<math>\varepsilon_0</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>8.85\times10^{-12}</math> | | style="height:20px; width:100px; text-align:center;" |<math>8.85\times10^{-12}</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>Fm^{-1}</math> | | style="height:20px; width:100px; text-align:center;" |<math>Fm^{-1}</math> | ||
|- | |- | ||
− | | style="height:20px; width:300px; text-align:center;" |Permeability of Free Space | + | | style="height:20px; width:300px; text-align:center;" |[[Permeability of Free Space]] |
| style="height:20px; width:50px; text-align:center;" |<math>\mu_0</math> | | style="height:20px; width:50px; text-align:center;" |<math>\mu_0</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>4\pi\times10^{-7}</math> | | style="height:20px; width:100px; text-align:center;" |<math>4\pi\times10^{-7}</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>Hm^{-1}</math> | | style="height:20px; width:100px; text-align:center;" |<math>Hm^{-1}</math> | ||
|- | |- | ||
− | | style="height:20px; width:300px; text-align:center;" |Speed of Light in Free Space | + | | style="height:20px; width:300px; text-align:center;" |[[Speed of Light]] in Free Space |
| style="height:20px; width:50px; text-align:center;" |<math>c</math> | | style="height:20px; width:50px; text-align:center;" |<math>c</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>3.00\times10^{8}</math> | | style="height:20px; width:100px; text-align:center;" |<math>3.00\times10^{8}</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>ms^{-1}</math> | | style="height:20px; width:100px; text-align:center;" |<math>ms^{-1}</math> | ||
|- | |- | ||
− | | style="height:20px; width:300px; text-align:center;" |Planck's Constant | + | | style="height:20px; width:300px; text-align:center;" |[[Planck's Constant]] |
| style="height:20px; width:50px; text-align:center;" |<math>h</math> | | style="height:20px; width:50px; text-align:center;" |<math>h</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>6.63\times10^{-34}</math> | | style="height:20px; width:100px; text-align:center;" |<math>6.63\times10^{-34}</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>Js</math> | | style="height:20px; width:100px; text-align:center;" |<math>Js</math> | ||
|- | |- | ||
− | | style="height:20px; width:300px; text-align:center;" |Boltzman Constant | + | | style="height:20px; width:300px; text-align:center;" |[[Boltzman Constant]] |
| style="height:20px; width:50px; text-align:center;" |<math>k</math> | | style="height:20px; width:50px; text-align:center;" |<math>k</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>1.38\times10^{-23}</math> | | style="height:20px; width:100px; text-align:center;" |<math>1.38\times10^{-23}</math> | ||
| style="height:20px; width:100px; text-align:center;" |<math>JK^{-1}</math> | | style="height:20px; width:100px; text-align:center;" |<math>JK^{-1}</math> | ||
|} | |} |
Latest revision as of 15:00, 7 September 2019
Key Stage 5
Meaning
A physical constant is a quantity which is believed to have the same value at all points in space and time.
About Physical Constants
- Physical constants are found through measurement and therefore carry a level of uncertainty in their values. As a result much time is spent by physicists to reduce that uncertainty with more precise and accurate measurements.
- The physical constants you should know of, but do not need to memorise are:
Physical Constant | Symbol | Value | Units |
Elementary Charge | \(e\) | \(1.60\times10^{-19}\) | \(C\) |
Rest Mass of a Proton | \(m_p\) | \(1.67\times10^{-27}\) | \(kg\) |
Rest Mass of a Neutron | \(m_n\) | \(1.68\times10^{-27}\) | \(kg\) |
Rest Mass of an Electron | \(m_e\) | \(9.11\times10^{-31}\) | \(kg\) |
Gravitational Constant | \(G\) | \(6.67\times10^{-11}\) | \(Nm^2kg^{-1}\) |
Permittivity of Free Space | \(\varepsilon_0\) | \(8.85\times10^{-12}\) | \(Fm^{-1}\) |
Permeability of Free Space | \(\mu_0\) | \(4\pi\times10^{-7}\) | \(Hm^{-1}\) |
Speed of Light in Free Space | \(c\) | \(3.00\times10^{8}\) | \(ms^{-1}\) |
Planck's Constant | \(h\) | \(6.63\times10^{-34}\) | \(Js\) |
Boltzman Constant | \(k\) | \(1.38\times10^{-23}\) | \(JK^{-1}\) |