An object has a weight of 9 N when it is in air and 7.2 N when it is submerged into water. What is the specific gravity of the object’s material?   (E) 9    (C) 7   (D) 8   (A) 5   (B) 6

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Q: 4) An anti-reflective coating has index of refraction 1.5. For wavelength 2 = %3D 500 nm, calculate…

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