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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. IL was invented in 1878 by the American astronomer Samuel Pierpont Langley. A bolometer consists of an absorptive element, such as a thin layer of metal, connected to a thermal reservoir (a body of constant temperature) through a thermal link.
A cylindrical tank has a radius of 8 meters and a height of 12 meters. If the tank is filled with water, how much time will it take to fill the tank com...
If the length of certain rectangle is decreased by 4 cm and breadth is increased by 2 c, it would result in a square of the same area. What is the perim...
Three cubes of metal whose edges are 3cm, 4cm and 5cm. respectively are melted and a single cube is formed. What is the length of the edge of the newly ...
The radius of a right circular cylinder is 3 times its height. If the height of the cylinder is 3.5 cm, then what is the volume of the cylinder. (in cub...
Each interior angle of a regular polygon is 140°. Then find out how many diagonals are there?
Perimeter of a square and circumference of a circle are in the ratio 9:11, respectively. If area of the square is 81 cm2, then find the radiu...
A wire is moulded into a circle of radius 21 m. Then the wire is bent and shaped into a rectangle of length 36 m. Find the area of the rectangle thus fo...
The sum of the perimeter of circle R and S together is 1012 cm. If the area of circle S is 18634 cm2 , then the radius of circle R is approxi...
