an empty density bottle weighs 30g and 54g when filled with kerosene if the volume of the bottle is 30ml. find the density of kerosene in:
(a) g/cm³
(b) 800kg/m³;RD=0.8
Answers
Explanation:
The bends are decompression sickness experienced by scuba divers when they ignore Boyle's law. As a diver dives deep inside water, the surrounding pressure of the water increases. The high pressures increase the solubility of the bodily gases in the blood of the diver.
Note: Every 10 meters of depth, pressure increases by 1 atm or 14.7 psi.
The deeper a divers goes, the more the quantity of gases dissolves inside the blood of the diver. When he/she ascends, the dissolved gases start expanding since the pressure gets lower. A well-trained diver will always ascend slowly. But if he/she somehow makes a rapid ascent, the diver will suffer in severe pain. The gases in the body of the diver will expand quickly, making the blood a foamy solution. Moreover, the gases between joints will also expand, which will cause the diver's body to blend. This sometimes can be a life-threatening condition.
Answer:
Density is defined as the amount of mass per unit volume.
Imagine 2 cubes. Each cube measures 1 cm × 1 cm × 1cm so that each cube has a volume of 1 cm3.
One cube is made out of gold and has a mass of 19.3 grams.
The other cube is made out of aluminium has a mass of only 2.7 grams.
Gold is said to be more dense than aluminium because, when we compare the same volume of the two different substances, this volume of gold has the greater mass.
We can also say that aluminium is less dense than gold because, for the same volume of the two substances, this volume of aluminium has less mass.
The density of each substance is given in units of mass per unit volume, for our cubes this will be mass in grams per cubic centimeter, that is, g/cm-3 or g cm-3.
Gold has a density of 19.3 grams per cubic centimeter, that is, 19.3 g/cm3 or 19.3 g cm-3.
Aluminium has a density of 2.7 grams per cubic centimeter, that is, 2.7 g/cm3 or 2.7 g cm-3.