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Upon heating, it softens at 50 °C and converts to gray selenium at 180 °C; the transformation temperature is reduced by presence of halogens and amines. [15] The red α, β, and γ forms are produced from solutions of black selenium by varying the evaporation rate of the solvent (usually CS 2).
Canada's annual average temperature over land warmed by 1.7 °C (3.1 °F) between 1948 and 2016. The rate of warming is highest in Canada's north , the Prairies , and northern British Columbia . The country's precipitation has increased in recent years and wildfires expanded from seasonal events to year-round threats.
By 1901, it could detect radiation from a cow from 400 metres away and was sensitive to differences in temperature of one hundred thousandths (0.00001 C) of a degree Celsius. [ 47 ] [ 48 ] The first commercial thermal imaging camera was sold in 1965 for high voltage power line inspections.
The scale is an absolute temperature scale with the same increment as the Celsius temperature scale, which was originally defined according to the boiling point (set to 100 °C (212 °F)) and melting point (set to 0 °C (32 °F)) of water.
Mongolia [b] is a landlocked country in East Asia, bordered by Russia to the north and China to the south. It covers an area of 1,564,116 square kilometres (603,909 square miles), with a population of 3.5 million, making it the world's most sparsely populated sovereign state.
Montreal [a] is the largest city in the province of Quebec, the second-largest in Canada, and the ninth-largest in North America.It was founded in 1642 as Ville-Marie, or "City of Mary", [19] and is now named after Mount Royal, [20] the triple-peaked mountain around which the early settlement was built. [21]
The U.S. Geological Survey has conducted research on sea level rise, addressing coastal vulnerability, and incorporating six physical variables to analyze the changes in sea level: geomorphology, coastal slope (percent), rate of relative sea level rise (mm/yr), shoreline erosion and acceleration rates (m/yr), mean tidal range (m), and mean wave ...