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.
Mining and quarrying activities in Tanzania contributed 3.7% to its GDP with USD 1.78bn in 2014, compared to only USD 598m in 2009, representing a value increase of almost 200%. Based on Tanzaniaâs Development Vision 2025 plan, the mining sector is expected to account for 10% of the GDP by that year. Minerals export accounted for USD 1.37bn of the total value of Tanzaniaâs export in 2015 (i.e. 24%) with gold representing more than 90% of the countryâs minerals export.