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GALLIUM PHOSPIDE: It has band gap of 2.3ev. it can be used for light emitting diodes which can emit green or red light. The red light is obtained with zinc or cadmium oxide doping.
SELENIUM: It is found in crystalline and non-crystalline form. It is used as rectifier material for photo voltaic cells and for xerographic printing. Selenium films are used as photo electric light meters. Its melting point is 2200C.
LEAD: it is soft heavy and bluish gray metal. It is highly resistant to many chemical actions but can corrode by nitric acid, lime and rotten organic substances. Lead and its compounds are toxic. It is mechanically weak it cannot withstand vibrations at high temperatures. It alloys easily with Tin and zinc and forms many commercial alloys, including solders and bearing metals.
#what are practical examples of like and unlike parallel forces?#
what causes change in motion? what laws govern motion? how do objects move in one dimension? how do objects move in two dimension?
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How many integers satisfy the inequality |10(x+1)/x^2+2x+3|=1?
The microwave (rotational) spectrum of 12 C 16 O having a series of lines spaced by 115.3 GHz. Suppose that the rotational energy levels of this molecule can be approximated by
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Assume a new planet was discovered to orbit the Sun with a period 5 times that of Pluto. Using the data, measure the average distance from the Sun for this new planet.
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A thermodynamic process, in which the volume of gas always same is known as isochoric process. In this process, the work completed by the body is zero. Therefore from first law
Q. Describe diffrent principle of rays? Principle Ray I : The easy one it hits the lens smack dab in the middle as well as passes straight on through. Principle Ray II : P
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