a brain weighing 1.0 Ib occupies a volume of 620 ml. What is the specific gravity of the brain?
454g/620mL=0.73
454g/620mL=0.73 g/mL
I send that everything have specific gravity why we find?
To find the specific gravity of an object, we need to compare its density to the density of a reference substance. In this case, we can use water as our reference substance.
The specific gravity (SG) of an object is calculated using the following formula:
SG = density of object / density of water
First, we need to find the density of the brain. Density is calculated by dividing the mass of an object by its volume:
Density = mass / volume
Given that the brain weighs 1.0 Ib (pound) and occupies a volume of 620 ml, we need to convert the weight from pound to grams, as the volume is given in milliliters.
1.0 Ib = 453.59 grams (approximately)
Now we can calculate the density:
Density = 453.59 grams / 620 ml
To find the density of water, we can use the fact that 1 ml of water has a mass of 1 gram. So the density of water is 1 g/ml.
Density of Water = 1 g/ml
Now we can calculate the specific gravity using the formula mentioned earlier:
SG = Density of Brain / Density of Water
SG = (453.59 grams / 620 ml) / (1 g/ml)
SG ≈ 0.731
Therefore, the specific gravity of the brain is approximately 0.731.
1 lb = 454 grams (approximately). You can look it up if you want more accuracy (for example 453.59 g).
density = mass/volume. Substitute and solve.