# Examples

The following examples show how the converter works. For more details see the help.
• Compute the average velocity of a good sprinter in kilometers/hour (100 meters in 11 seconds)

• Type 100/11 in the field Number to convert, m/s in the field Unit to convert from, km/hr in the field Unit to convert to, and press Convert.

• Compute the velocity of light in atomic units

• Type 1 in the field Number to convert, c in the field Unit to convert from, select the Atomic units option, and press Convert.

• Compute the mass m, in grams, of 1000 cm3 of oxygen (32 grams per mole) at 5 atmosphere pressure and 350 Kelvin [PV = NRT, m = NMmol, so that m = (PV/RT)Mmol ]

• Type 32 in the field Molar Mass, 5*1000 in the field Number to convert, atm cm^3/(R 350 K) Mmol in the field Unit to convert from, g in the field Unit to convert to, and press Convert.

• Compute the mass energy, in MeV, of the electron at rest [E=mc2]

• Method 1: Type 1 in the field Number to convert, me c^2 in the field Unit to convert from, MeV in the field Unit to convert to, and press Convert.
Method 2: Type 1 in the field Number to convert, me in the field Unit to convert from, MeV in the field Unit to convert to, and press Adapt.

• Compute the thermal energy in eV at 293 Kelvin [E=kT]

• Method 1: Type 293 in the field Number to convert, k K in the field Unit to convert from, eV in the field Unit to convert to, and press Convert.
Method 2: Type 293 in the field Number to convert, K in the field Unit to convert from, eV in the field Unit to convert to, and press Adapt.

• Compute the wavelength, in nanometers, of a photon of energy 1.42 eV [l = hc/E]

• Method 1: Type 1/1.42 in the field Number to convert, h c/eV in the field Unit to convert from, nm in the field Unit to convert to, and press Convert.
Method 2: Type 1.42 in the field Number to convert, eV in the field Unit to convert from, nm in the field Unit to convert to, and press Adapt.

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