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Observe the following different structures of carbon compounds having same molecular formula CH,CH, - CH, -CH- CH, and CH, -CH-CH,What do we call this property?If the power of a lens is 0.5 D. What is its focal length ?Write the value of Planck's Constant.Who am I?(1) I am an element in third period(ii) My valency is zero.​

Answer»

If the POWER of a lens is 0.5 D. What is its FOCAL length ?WRITE the VALUE of Planck's CONSTANT.



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