Why are the soldiers, who usually march in front step when crossing the bridge, are ordered to go “at ease”? Because marching across the bridge, they can destroy it. This happens due to an interesting physical phenomenon – resonance. However, the phenomenon of resonance is actively used not only in physics. For example, the term “public resonance” means the reaction of a large number of people to some event, political, economic, or social. But in our article, we will talk specifically about physical resonance, its significance in physics, causes, and the most striking examples from life.
Since ancient times people were observing a beautiful starry sky. They had the custom to combine stars into constellations, naming them by different mythical creatures simultaneously composting myths and legends about them. We wrote an article about the Leo constellation, and today the topic of our article will be another interesting constellation – the Taurus constellation.
Mosquito is a very ancient representative of the fauna of our planet. These small flying bloodsuckers have bothered dinosaurs, and today they are no less annoying. In our article, you’ll learn everything about mosquitoes: habitats, diet, appearance, reproduction, and so on.
Life on our planet is characterized by an incredible variety of all kinds of living organisms, sometimes having an incredibly complex structure. All this diversity of life: from the simplest insects and plants to us, people (the most «complex organisms») consist of cells, these small bricks of living matter. If a human is the crown of biological evolution, then it will be very interesting to investigate its beginning: the simplest unicellular organisms which at the dawn of history became the founders of all life. The paramecium caudatum (along with amoeba) is one of the most famous simple unicellular creatures. What are the characteristics of the paramecium? What do paramecia eat? How do paramecia reproduce? Read on about all this below.
The friction force arises from the contact of the surfaces of two physical bodies. The theory of friction worried the minds of mankind, since the earliest times. Ancient engineers: builders of the Egyptian pyramids, Stonehenge in England or mysterious stone idols on Easter Island, all of them (as well as their modern colleagues) were dealing with the problem of friction and how to minimize it. It is difficult to move heavy loads due to the friction force. Our distant ancestors invented such a useful invention as the wheel and many other important discoveries to solve this problem. In our article, we will look at the friction force in the physical aspect.
Although the lion is considered the king of animals, it is smaller than the tiger. Yes, the tiger is the biggest predator of the cat family. This “cat” has 3 meters in length with an average weight of 250-300 kg (550-660 pounds). The tiger name meaning came to us from the ancient Persian language, which means “sharp, fast”.
Amoeba is one of the most famous simple single-celled organisms and is an important object for the study of biologists. Understanding how the simplest unicellular organisms exist and function will help us to learn the very beginning of a long evolutionary path. What is the structure of the amoeba, its habitat? How does the amoeba eat? Read more about this in our article.
Fusion is the process of transforming a body from a solid to a liquid state under the influence of temperature. A classic example of fusion from life is the melting of ice, its transformation into the water, or the transformation of a solid piece of tin into a liquid solder under the action of a soldering iron. The transfer to a body of a certain amount of heat can change its state of aggregation; this amazing property of solids to turn into liquids under the influence of temperature is of great importance for science and technology. Scientists (as well as technicians, engineers) need to know at what temperatures certain metals melt (and sometimes not only metals), and for this, such a concept as “enthalpy of fusion” has entered into physics.
The raccoon is one of the funniest representatives of mammals. Raccoons are very mischievous and at the same time sociable, peaceful and friendly, they easily make contact with a person. They are infinitely curious and the smartest among animals along with dolphins, monkeys, elephants, cats, and dogs.
Since ancient times, people have been observing our beautiful starry sky, uniting various stars in groups – constellations. The names of mythical heroes, sometimes fabulous creatures, and sometimes real were given to constellations. One of such constellations was the Leo constellation, in the outline of which our distant ancestors saw the majestic “king of beasts.” The Leo constellation is one of the brightest and most beautiful on our horizon.