Anthracite, also known as hard coal, is a hard, compact variety of coal that has a submetallic luster. It has the highest carbon content, the fewest impurities, and the highest energy density of all types of coal and is the highest ranking of coals.
119) The variety of coal having the highest carbon content is
Answer is:
Anthracite
Explanation:
Related RRB SSE Mechanical Question Paper 2014 (Set-1) with Answer Key
Answer is:
Magnetic Radiations
Explanation:
A bolometer is a device for measuring the power of incident electromagnetic radiation via the heating of a material with a temperature-dependent electrical resistance. It was invented in 1878 by the American astronomer Samuel Pierpont Langley.