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A noise is a complex mixture of sounds producing an annoying or undesirable (unpleasant) auditory sensation. Noise has several harmful effects on humans: such as ** Deafness **The stress **Nervousness

Mechanical vibration is measured in three parameters: ** Acceleration (ms-2 where g) measured by accelerator) Photo source ** Displacement (µm) measured by (Displacement or proximity sensor) Photo source

Définition: Une onde mécanique appelé aussi onde matérielle: c'est une onde qui se propage d'un milieu matériel avec transport d'énergie mais sans transport de la matière exemple les ondes sismiques, le

Les ondes sinusoidales Définition L'onde sinusoïdale c'est une onde progressive décrite par un sinusoïde en fonction de temps. Exemples : *Les ondes électromagnétiques exemple les rayonsX ,les rayons gamma,

Hello "lovers of nature and passionate followers ❤️🎄🌷🌹🌺❤️ ❤️Positivity has many sources especially flowers😍❤️😍❤️ ❤️Flowers influence our emotions❤️❤️. ❤️ Bring joy to our souls❤️❤️ ❤️❤️❤️I dedicate

The Bureau of Meteorology was quoted as saying that there was a possibility of ash being blown from volcanic eruption at Tonga onto the eastern coast of Australia, and there could be ash in the sunset

Having a collection and photographing it, is a form of happiness. This is one of my diecast collections from the Tomica brand. Lamborghini Urus, I love the shape of this diecast. I hope you guys like it

A walk in black and white. Rules to follow in this Black & White photography challenge: • Black and white images that represent any positive meaning in life. • Present one or two images every day.

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L’acoustique est une branche de la physique dont l’objet est l’étude des sons et des ondes mécaniques. Elle fait appel aux phénomènes ondulatoires et à la mécanique vibratoire. Source de photo En tant

This plant is one of the few edible Hollies if not the only one, but not the berries as they will make you very sick. Its species is known as Ilex vomitoria so eating it would give you some pause. But

This season, city is decorated with Christmas decorations referring to animal and landscape motifs taken from Wawel tapestries. Giraffes, camels, cats of prey and birds of paradise appeared in space of

Photography Lovers Curation Report Hello Photography Lovers! Welcome to another curation report from the community. We are committed to curating the best photography content on the Hive BlockChain as well

Problème : Comment les végétaux fabriquent t-ils leur matière organique à partir de matière minérale (eau et dioxyde de carbone) et de lumière ? La photosynthèse est une réaction chimique qui permet à

Despite popular sayings, which place cats and dogs as enemies, as well as cats and rodents, they can be friends. In homes, it has been shown time and time again that animals that live together can become

Evolution follows the climate: oaks quickly adapted to the climatic variations of the Anthropocene. With the acceleration of global warming due to human activities, the question of the speed of evolution

The greenhouse effect is a natural phenomenon. It traps part of the solar radiation and allows the temperature of the lower atmosphere to stay around 15 ° C on average, which has allowed the development

Hey everyone! Here is the full recording from yesterday's Live Weekly LeoFinance AMA 2021 Recap, LeoFinance AMA, New Backgrounds and Polygon Updates In this weekly AMA, we had more of a roundtable style

ProjectBlank has been one of the most talked about projects that LeoFinance is building. We've been working on it for so long and talking about it for even longer. Despite the project being much larger

RED FLOWER Symbols of passion, red flowers immediately catch the eye in the garden Red symbolizes passion, warmth, vitality and dynamism. Giving flowers remains a socially important gesture, whether it