Thermometers 1 A thermometer is a device that measures temperature or temperature gradient, using a variety of different principles. The word thermometer is derived from two smaller word fragments: thermo from the Greek for heat and meter from Greek, meaning to measure.hermometers 1 A thermometer is a device that measures temperature or temperature gradient, using a variety of different principles. The word thermometer is derived from two smaller word fragments: thermo from the Greek for heat and meter from Greek, meaning to measure.
The absolute value of GDP in Rwanda rose â¬213 $490 million with respect to 2013. The GDP per capita of Rwanda in 2014 was â¬491 $662, â¬5 $23 higher than in 2013, it was â¬486 $639.
However, this is less than a tenth of what the US spent. Not all NATO members spent the same percentage of GDP on its military. Germany's $44.30 billion (Â£23.65 billion) expenditure represents just 1.15% of its GDP, while Estonia's $430 million (Â£280 million) invested in its military accounted for around 2% of its GDP in 2014.