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Whithin which type of system is neither the total mass nor the total energy conserved ? a. open b. connected c. isolated d. closed
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Does a energy transformation happen when you drop your pencil
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Working alone at its constant rate, pump x pumped out ¼ of the water in a tank in 2 hours. then pumps y and z started working and the three pumps, working simultaneously at their respective constant rates, pumped out the rest of the water in 3 hours. if pump y, working alone at its constant rate, would have taken 18 hours to pump out the rest of the water, how many hours would it have taken pump z, working alone at its constant rate, to pump out all of the water that was pumped out of the tank? a) 6b) 12c) 15d) 18e) 24
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Describe the frequency and wavelength range of radio waves...
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