A circular disc of area 2 cm' is made up of aluminium of temperature 25°C is put in a
furnace whose temperature is 225°C. Find the change in area and final area of disc
(λal= 23x10-6°C)
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energy, in physics, the capacity for doing work. ... It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another.
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A photograph (also known as a photo) is an image created by light falling on a photosensitive surface, usually photographic film or an electronic image sensor, such as a CCD or a CMOS chip. ... The process and practice of creating such images is called photography
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