How many apples should you eat? Detailed answer

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How many apples should you eat? Detailed answer

Big encyclopedia for children and adults

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How many apples should you eat?

Scientists believe that it is required to eat at least 60 kg of apples per year, that is, at least one apple a day. Apples do not cure this or that disease, but improve the vital activity of the whole organism.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

What is musical sound?

Each art form has its own pictorial means. Paintings are created using paints and pencils, as well as canvas or paper. The sculptor in his work uses stone, clay, metal, plastic. Poet - words.

And the composer? He writes music using sounds, more precisely, combinations of sounds. And the sounds are connected with each other not just like that, but according to certain musical laws.

All sounds are divided into musical and noise. What is the difference between musical sound and noise sound?

First of all, each musical sound has its own pitch, which makes it possible to distinguish one sound from another, to repeat the sound heard by voice or on a musical instrument.

But noise sounds do not have an exact height - we cannot accurately determine the sound height of noise by ear. Noise is noise. It is impossible to reproduce exactly how a tree rustles in the wind, either with a voice or with a musical instrument. In music, of course, musical sounds are of primary importance, although noise sounds are often used - they are created by many percussion instruments.

A single musical sound has four basic properties: pitch, loudness, timbre, and duration.

The pitch of the sound depends on the frequency of vibration of the object, such as a certain string of a musical instrument, which is the source of the sound. The higher the oscillation frequency, the higher the sound, and vice versa.

Loudness is already determined by the range (amplitude) of oscillations, for example, of the same string. The larger the amplitude, the stronger and more powerful the sound.

But the same musical sound in height and volume can have a completely different color, depending on the method of extracting the sound. One and the same sound, one and the same note, if you take it on the piano or on the flute and sing it, will have different musical colors. The coloring of sound is timbre.

Well, the time occupied by the sound is called the duration of the sound.

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