Convert millijoule to horsepower hour
Please provide values below to convert millijoule [mJ] to horsepower hour [hp*h], or Convert horsepower hour to millijoule.
How to Convert Millijoule to Horsepower Hour
1 mJ = 3.72506135678938e-10 hp*h
Example: convert 15 mJ to hp*h:
15 mJ = 15 × 3.72506135678938e-10 hp*h = 5.58759203518407e-09 hp*h
Millijoule to Horsepower Hour Conversion Table
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Millijoule
A millijoule (mJ) is a unit of energy equal to one thousandth of a joule, where 1 joule equals 1 newton meter or 1 kg·m²/s².
History/Origin
The millijoule is derived from the SI base unit joule, with the prefix 'milli' indicating a factor of 10⁻³. It has been used in scientific and engineering contexts to measure small amounts of energy, especially in fields like electronics and biomechanics.
Current Use
The millijoule is commonly used today to quantify small energy quantities in electronics, biomedical applications, and energy measurements where precision at a small scale is required.
Horsepower Hour
A horsepower hour (hp*h) is a unit of energy representing the amount of energy equivalent to one horsepower of power sustained over one hour of time.
History/Origin
The horsepower hour originated from the traditional unit of horsepower used to quantify engine power, combined with the hour to measure energy consumption or production over time. It has been used primarily in engineering and energy industries to express energy usage or capacity.
Current Use
Today, the horsepower hour is rarely used in practical applications, having been largely replaced by the joule and other SI units. However, it may still be referenced in historical data, legacy systems, or specific industries dealing with older measurement standards within the energy and mechanical sectors.