Science at home! Fun homemade experiments for the little ones. Today we will learn about the Resistance!
Before we start the fun we will study an important term:
What is resistance:
Resistance is understood as the action in which a person, animal, thing or organism resists or has the ability to resist, that is, to stand firm or in opposition. Source
Now if we see what it is and what we need:
Materials:
We need hair about 5 cm long, it is not necessary to tear it out of our heads since more than 100 hairs fall out regularly every day, so we can't search the brush that we regularly use to comb our hair.
We need books, boxes or some object that have the same height (in our case we end up using two chairs)
A pencil
Scotch tape
One click
A plastic bag
Marbles or coins
If you prefer And it is to your liking other people's hair other than you to check the resistance.
Let's go with the procedure:
- The first thing we have to do is take a hair and roll it right in the middle of the pencil and hold it with the adhesive tape.
- Then the other end of the hair we must hold it in the clip making a knot or placing another piece of adhesive tape.
- Then clip the plastic bag you got for the experiment to the clip.
Then hold pencil and pull the bag to check how the hair holds it
Stack books or place a couple of boxes that are the same height, or a couple of chairs leaving a space between them for the bag to fit.
Then put the pencil with the hair and the bag hanging in the middle of the stack of books or chairs
Then start putting marbles or coins in the bag to see how resistant the hair is
Once the hair breaks, remove the bag and check that it weighs resist before breaking
You can repeat the experiment with other people's hair to check which one has more resistance.
Result of the experiment:
Hair @lasocia: The experiment started with my hair and it turned out to be stronger than tough than I thought, my daughter Sofía managed to put 10 pieces between marbles and coins,she could not understand how the hair resisted so much and did not burst.
Sofia hair: Then it was my daughter Sofía's turn, we put a total of 6 pieces in bag 4 less than what we put in @lasocia bag.
So my hair turned out to be much more resistant than my daughter Sofía's.
What has happened?
A single hair measures approximately 0.1mm, this is why it is surprising that such a thin thing can have so much resistance, this is why we must know that the hair has three layers:
The first part of the hair is the inner layer called the medulla and it is the most fragile part of the hair.
The second part of the hair is the intermediate one called the cortex and it is the thickest of all, and it is made up of keratin, which is why there are so many hair products that contain this element.
And the third part is the external one that is as if they were scales that make the hair more solid and have both resistance and resistance.