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

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,

When winter suddenly comes, among the first victims are the garden plants that were already dreaming of spring. Their dream comes to an abrupt end. When winter suddenly comes, I don't know why it happens

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

Hello Everyone, We often believe that salt is one of the causes of hypertension and stroke. But it turns out that salt is also very useful for human life if it is not consumed too much. Typically, salt

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.

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

A friend on Hive said there must be much hidden life in our garden. A pair of dragonflies in the gooseberry bush doing what they were born to do. She also said that they might need our help, but I don't

Have you noticed that a lot of birds don't seem to migrate anymore? I recovered a starling this morning from the yard, not taking the migratory path and the cold just got too much, It takes time and energy

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

happy saturday..

A late start of the day. Weather has been cloudy and rainy. In the afternoon, after the rain stopped, I went out to do my shopping and actifit steps. Shopping was good. I spent almost an hour walking in

Color psychology is responsible for investigating how colors affect us. Colors can change our perception, alter our senses, make us feel emotions, etc. Colors have the power to improve our memory and our