A metal object of mass 195 g is lowered into a measuring cylinder containing 250 cm of water. The water level rises to 275 cm. What is the density of the metal?
Answer and explanation
Correct answer: B. 7.8 g/cm
- Step 1: Volume of the object cm.
- Step 2: Density = mass volume g/cm.
Answer
7.8 g/cm.
Why not the others: 0.709 g/cm: the final reading is used as the volume of the object. 0.78 g/cm: the starting volume of water is used. 0.128 g/cm: volume is divided by mass.
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