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How many molecules are present in 3 mols of silicon dioxide (sio2)?
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Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge
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Kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energy b. motion energy c. sound energy d. thermal energy
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Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference
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If a wave hits a smooth surface at an angle of incidence of 40 degrees, the angle of reflection is <...
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