B: mass / volume
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Four identical measuring cylinders contain liquid. Two contain water of density 1000 kg/m³. Two contain paraffin of d…
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A hard stone hits the ground and comes to rest almost immediately. As the stone hits the ground, what is the directio…
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Fillings in teeth should be made from a material which
The displacement-distance and displacement-time graphs are for a water wave in a ripple tank. What is the speed of th…