... the water level raises to 28.5 ml. what is the density of this object? what is the specific gravity?
Answers (1)
This question is confusing because it doesn't specify that the object floats or sinks. It takes a while to figure that out. You need to study the definition of density so you could recognize that for yourself.
The object displaces 8.5 ml of water, which equals 8.5 grams (approx), so we conclude that the object sank and its volume is 8.5 cc. From that we calculate the density to be 30g/8.5cc = 3.5294 g/cc and specific gravity is 3.5294. The accuracy of the measurement does not warrant so many decimals because water's density is 1 g/cc only at one temperature, about 4 degrees C.