Lab lesson 8 (IP8)!

We also learnt about DENSITY

The mass density or density of a material is defined as its mass per unit volume The symbol most often used for density is ρ (the Greek letter rho). In some cases (for instance, in the United States oil and gas industry), density is also defined as its weight per unit volume although, this quantity is more properly called specific volume. 

Less dense fluids float on more dense fluids if they do not mix. This concept can be extended, with some care, to less dense solids floating on more dense fluids. If the average density (including any air below the waterline) of an object is less than water (1000 kg/m³) it will float in water and if it is more than water's it will sink in water.

Density is a SI unit, and the formula for density is p=m/v (p being density)

So how is density applicable in our daily life?


Density becomes important anytime someone wants to build something where weight and distribution of weight are critical. Ships require ballast to stay upright in the water, airplanes use counterweights to ensure they fly correctly. In either case, during the initial design, engineers must account for how much weight they need, and how much space must be allotted for it. To determine how much space they need, they must know the density of the materials they plan on using.

Interesting Phenomenon of Density - The Dead Sea 

We can all float in the Dead Sea because the salt concentration of the Dead Sea fluctuates around 31.5%. This is unusually high and results in a nominal density of 1.24 kg/L. Anyone can easily float in the Dead Sea because of natural buoyancy.


Reflection:
In the course of this project, I learnt on how to calculate density (p=m/v) with p being density and how to solve questions regarding the use of the formula of density. I also followed up on the laboratory lesson by searching on infomation about Density and how density is applicable in our daily lifes. This experience has also helped me to appreciate more phenomenons like the Dead Sea where the salt level is six times more than the typical sea. This laboratory lesson has also answered some of my questions when I was younger like: "Why does oil float on water" and other similiar questions.


Summary:

•  Density is calcalated by P=M/V with P being density
•  The mass density or density of a material is defined as its mass per unit volume The symbol most often used for density is ρ (the Greek letter rho)

• Density is a SI unit

• Density is applicable in our daily lives with examples such as planes needing counter weights to make sure the plane is stable and flys smoothly in the air

• We can all float in the dead sea due to density!