It is easiest to answer this question using the metric system.
148.5 pounds = 67.36 kilograms
So density = 67.36 / 30.5 kg per cm3 = 2.208 kg per cm3 = 2208 grams per cm3
Density of water = 1 gram per cm3
So specific gravity of the mass = density of the mass / density of water = 2208
The specific gravity of gold is 19.3 The mass will be 3.28*19.3 = 63.304 grammes.
specific gravity of 4 4 times the mass of water, which at 50ml would weigh 50 grams.
Specific gravity of iron is approximately 7.85 3.2 kg divided by 7.85 = 0.4076 litre or 407.6 millilitres
The answer is Density.
Basically you need more information. You can use the following formulae: density = mass / volume weight = mass x gravity
weight = mass * gravitational constant. Newtons (weight) = kg * m / sec^2 for instance.
specific gravity
Volume = mass / specific gravity. Units are cubic centimeters and grams or cubic meters and tonnes. s.g. has no units : it is a dimensionless quantity.
Specific Gravity
Relative densities (specific gravity) density of sample = mass / volume
A specific gravity of 4.0 for a mineral means that a given volume of the mineral has 4.0 times the mass of the same volume of water.
The specific gravity is 0.5
if you know the specific gravity and the volume of the substance you can find the mass.
Density = mass/volume or D=m/v
Specific gravity refers to the ratio of the density of a substance to the density of a standard, which is usually water. A piece of metal that has a mass of 200 g and a volume of 2 cm3 has a specific gravity of 100.
Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity usually means relative density with respect to water.
It is the inverse of the specific gravity of copper.