PAN_SPRCHA: to je slabe. Btu (ohrati 1 libry vody o 1 fahrenheit) je zabavnejsi. Hlavne totiz maji jednu fintu:
"The unit Mbtu is used in natural gas and other industries to indicate 1,000 BTUs. However, there is an ambiguity in that the metric system (SI) uses the prefix "M" to indicate 'Mega-', one million (1,000,000). Even so, "MMbtu" is often used to indicate one million BTUs particularly in the oil and gas industry.
Energy analysts accustomed to the metric "k" ('kilo-') for 1,000 are more likely to use MBtu to represent one million, especially in documents where M represents one million in other energy or cost units, such as MW, MWh and $."
British thermal unit - Wikipediahttps://en.wikipedia.org/wiki/British_thermal_unit