#zCPNwdomu: Popular science
SIMPLE ISOTONIC DRINKS
Adequate hydration and the supply of minerals and carbohydrates is important during increased physical activity or hot weather. It is reported that when we lose as little water as 5% of our body weight, our body's efficiency can drop by up to 30%.The best way to replenish water and minerals is to drink isotonic drinks. These drinks have the same pressure, called osmotic pressure, as body fluids in our body, thanks to which they are able to rehydrate our body in a very quick and easy way. Isotonic drinks can also be made at home, and the best ones are those made together #zCPNwdomu
WANDERING COLOURS
We are sure that most children and teenagers are already prepared for the new school year, so to warm up together with #zCPNwdomu, you can perform a simple experiment using what is in your pencil cases, i.e. felt-tip pens. As you can see, the dyes go up against the force of gravity…This is due to the same forces that work while wiping a wet stain with a towel.
Toothpick star
Let's imagine a situation when we come home from a weekend trip and find our flowers slightly wilted… what do we do then? Of course, we water it, after a few moments our flowers return to good condition. Why is this happening? This can be explained by doing a very simple experiment, using only the half-broken toothpicks and some water. Wooden toothpicks have the same structure as plant cells. When the wood is drying, most of the water between the cells evaporates, leaving voids (channels) between the cells. When we add water between the toothpicks, it will be drawn into these very narrow, hollow channels thanks to the so-called capillary effect. When squashing toothpicks, you also squash the cells and tubules inside the toothpicks. After the water gets inside the toothpicks, the turgor pressure tries to restore their original shape, so we observe their straightening. Just like the slightly wilted flowers #zCPNwdomu
Magic dye
We offer you another portion of knowledge through experiments. Imagine brewing tea from a teabag. What happens inside the glass then?
Exactly, tea penetrates into the water, dyeing it the colour of tea. This phenomenon is called diffusion. The particles of two substances mix spontaneously, but the mixing speed depends on many factors. We want to conduct an experiment with you in which we will check what may affect the rate of diffusion of dyes in water.
Is pepper afraid of soap?
It's time for a some experiments with #zCPNwdomu. And the hero of this experiment will be the well-known pepper that we all know from the kitchen. Is pepper really afraid of soap? To understand this experience, the first thing to understand is that water is made of molecules that attract each other, which gives rise to a phenomenon known as surface tension. Therefore, water behaves like an elastic film and creates beautiful dew drops. And how does the structure of soap relate to it? A single soap molecule consists of a "head" that likes water (the so-called hydrophilic) and a water-repellent tail (the so-called hydrophobic part).Such a structure causes the soap particles to enter between the water particles, reducing the ability to attract them to each other, i.e. they reduce the surface tension of the water. On the other hand, water molecules that soap was unable to reach still strongly attract each other, and pepper, which stays on the elastic membrane of water. The addition of soap “disperses” the water molecules, and thus pepper, to the rim of the pan. In the same way as escaping pepper, soapy water removes grease and dirt from the skin, including harmful bacteria and viruses. So remember that washing your hands with soap and water will also remove the coronavirus from them.
