Why?

2021-11-01 14:02:00 WHY are the pills made in different colors?

The pills, in addition to their direct effect, impact the patient psychologically.

Scientists have proven that the psychological effect is stronger for pills with "beautiful" colors.

Besides, the coloring helps to distinguish the pills. Of course, all dyes have to be tested for safety. Открыть/Комментировать

2021-10-31 21:00:02 WHY do I want to stretch after sleeping?

When sleeping, body temperature and respiration rate decrease and muscles relax as much as possible This causes the blood flow to decrease.

When you stretch, muscles tense, venous blood flow increases, capillaries dilate, and impulses from muscle receptors increase the tone of the brain, making awakening final. Открыть/Комментировать

2021-10-31 14:04:00 WHY do cats always land on their feet?

This ability of cats is anchored at the level of reflexes. Its first manifestation begins in kittens at the age of 3-4 weeks, and around 6-7, when the animal begins to actively learn the world, is finally fixed.

The flexible backbone, absence of collarbones and well-developed vestibular apparatus assist in this. Falling down, a cat immediately begins to align its body to the ground. Открыть/Комментировать

2021-10-30 22:00:02 WHY do muscles increase in volume after working out?

During a muscle workout, the muscle fibers are torn and the outer cell membranes are destroyed, causing the release of signaling substances.

After that, muscle tissues actively divide and their number, size increases. The muscle becomes bulkier Открыть/Комментировать

2021-10-30 16:00:10 WHY is the water in the sea salty?

River water washes salt out of the rocks that make up its bed. Further, the river water enters the world's oceans.

The world's rivers add one sixteen millionth of salt to the world's oceans each year.

The water then evaporates, falling as precipitation back onto the land to add another pinch of salt to the ocean again. Открыть/Комментировать

2021-10-29 21:00:03 WHY do people get fat with age?

As people age, their metabolism (proteins, fats and carbohydrates) slows down. And even with the same lifestyle as in your youth, it will be harder to stay in tip-top shape in adulthood.

Also, as time passes, people tend to achieve a higher social status, which requires less physical activity. Открыть/Комментировать

2021-10-29 14:00:01 WHY is mercury a liquid?

The other metals we're used to seeing as solids have a much higher melting point than mercury.

Mercury, on the other hand, has a melting point of -38.83°C, so we see it as liquid. If the temperature is lowered to -39°C, mercury becomes solid, like all metals.

Being in this aggregate state, mercury begins to evaporate at room temperature, just like any liquid. Открыть/Комментировать

2021-10-28 18:02:01 WHY does watermelon not sink in water?

Cause it looks like a ball, and it doesn't sink! Yet watermelon is many times heavier than a ball, and it would seem that it should sink.

The answer to this question lies not in the form, but in the content.

Thing is, the striped berry is mainly composed of water. However, due to the fact that its flesh is porous, its density is less than that of water. For this reason, the berry does not sink, but floats on the surface of the liquid. Открыть/Комментировать

2021-10-28 14:19:56 WHY does music give us goosebumps?

The vegetative nervous system, also called the autonomic nervous system, triggers such a reaction when we are emotionally aroused. This system is responsible for functions beyond our will.

Listening to music can also create feelings of aesthetic character, which excite the nervous system. This, in turn, sends signals to the organs, including the skin. And goosebumps are a consequence of the muscle contraction of the hair follicles. Открыть/Комментировать

2021-10-27 19:02:00 WHY is chewing gum hard to digest?

That's why chewing gum labels say you cannot swallow it.

The gum is made of plastic, the gastric acid and enzymes are unable to digest it and it passes through the digestive tract unchanged.

Only the plant substances such as additives and flavors are digested. The base material is eliminated from the body naturally. Открыть/Комментировать