A child takes approximately 8 to 35 questions per day. But, what you have to do when you have matured and you did not get answers to questions like: “why during the day of mourning is low the flag?”, “Why the sea water is salty and the fish do not?” and “why toothpaste ruins the taste of a sweet breakfast?”? We are ready to help you: read the article and discover something new.
Great.guru found interesting questions whose answers surely will interest people of any age.
1. Why do marathon runners run 42 kilometres 195 metres?
The length of a marathon initially was not fixed (about 40 km), the main condition was unique: all athletes ran the same route. It is believed that the current distance of a marathon was enacted thanks to the royal family, which wanted to observe the race from the windows of Windsor castle during the celebration of the Olympic Games of London in 1908. In total, we increased the distance to 2 kilometers 195 meters. After this, the length was modified from the Olympic Games to others. Finally, the distance of a marathon race: 42 kilometers 195 meters was established in 1921 by the International Association of Athletics Federations (IAAF).
2. Why on the phone’s keypad the numbers 1, 2, 3 are located above and in the calculator below?
The phone with buttons, and the calculator is produced of different devices. This last is obtained from a cash register. To perform calculations, frequently only used the digits 0 and 1, that’s why they were placed below, in such a way, would be more accessible.
Phones with buttons were an alternative to pulse dialing. The company’s Bell Labs conducted an experiment under the name “engineering Studies of human factors in design and use of telephone devices with buttons”. It conducted a test in several experimental models of keyboards on the phone to find out what would be the easiest thing for the human being. In each group, evaluating parameters such as speed input, a low level of error and preference.
Experimental designs for the telephone keypad for “engineering Studies of human factors in design and use of telephone devices with buttons”.
Based on this result, the engineers of Bell invented a keyboard taking a matrix of 3×3 with zero down. This location is still used to today, was also adopted for the smart phones.
3. Why during a day of mourning down the flag?
The custom of raising the flag to half-mast was observed in the SEVENTEENTH-century sailors, british military doing in memory of their fallen comrades. Primarily, the flag is lowered a distance equal to its altitude, as if liberated from a space to a special flag: the flag of invisible death. The ability to match the winners and losers in a battle is what stands out the greatness and the power of death.
4. Why toothpaste ruins the taste of a sweet breakfast?
The food is a chemical process. Each product has a unique formula of molecules that match certain taste buds.
The presence of sodium dodecylsulfate (SLS) or sodium lauryl ether sulfate (SLES) in the toothpaste not only helps to this composition to produce bubbles such as, for example, in the shower gel, to which we also added to these substances, but also violates the perfect balance between the molecules of the taste buds and our receivers. The SLS or SLES weakens the receptors “sweet” and destroy the connections that suppress the bitter taste.
5. Why when you tickle yourself you don’t feel them?
Scientists at the University College London found that the cerebellum does not allow us to do tickle. The cerebellum is a region of the brain whose main function is to integrate the pathways sensory and motor pathways. When you get tickled, precisely you distinguish that feeling is to be expected from the unexpected touches. There is the hypothesis that the function of tickling (as the effect remaining of evolution) is a notification of the presence in the skin of strange creatures, for example insects.
6. Why is “Sunday” in English is Sunday if it is not always a sunny day?
Sunday: “Sunday” in English, translates as “the day of the Sun”. For many people, Sunday was a day dedicated to the Sun (Sun god). An interesting fact: all months that begin on a Sunday will include a Friday the 13th.
7. Why is the Pacific ocean called pacific?
Initially, this ocean was called the Great. The Portuguese Ferdinand Magellan, the head of the Spanish caravels in 1519, he was in search of the Moluccan islands. The expedition in 1521 he crossed the ocean and sailed in the Philippines. During all the time of the trip (4 months and 4000 miles), according to the tales of one of the members of the crew, not a single time was met with a storm, even a weak one, that’s why it was decided to name the ocean Pacific. However, the crew only had luck, because especially in the Pacific ocean, form 75 percent of all hurricanes of our planet, in addition, its speed is 800 kilometers per hour.
Here you can see the map of the winds and the sea currents.
8. Why liquids and gases are heated below?
The liquid or the gas is heated from below because the heat is transferred through the flow of liquid or gas due to convection, as a result, heats up the entire volume, and not just the top, but also transfers the heat of the solid due to heat conduction, where energy is transferred from one body part to another due to the movement of the molecules.
9. Why the human being has the ribs separate?
The main engine of the respiratory system are the intercostal muscles, but the bone part flat in the chest would exclude their presence. The intensity of the breath slows the metabolism. The movement of such a creature would not be so fast and long. The confirmation of this is the turtle, whose shell represents the ribs united and the ossification of the skin.
10. Why in the lamps of the household will indicate watts, if the luminous flux is measured in lumen?
In watts does not indicate the brightness, but the consumption of energy. Previously, when there were only incandescent lamps, the light output was approximately proportional to capacity consumed, and no one thought of the lumen. But with the emergence of technologies (fluorescent and backlight) on the lamps, they began to indicate the luminous flux in lumen, and the capacity in watts. Fluorescent lamps consume 4 to 5 times less energy, and LED lamps of 5 to 10 times with a light output equal to that of incandescent lamps.
11. Why is the water in the sea is salty and the fish are not?
In a liter of sea water there is dissolved about 35 g of salt. But in the blood and fluids in tissue, the majority of marine fish have less of the double concentration of salts. But the concentration of salts in the blood and in the fluid tissue of most marine fish is three times lower. This creates a strong osmotic pressure (pressure that occurs between solutions of different concentrations when they are in contact). This “sucks” the water from the body of the fish. Although their bodies prevent the outflow of liquid, a certain amount of water is lost through the gills, feces, mucus, etc., To replenish this loss, the fish drink sea water and the “desalinizan” within the body, eliminating the excess of salt, mainly through the gills, but also through the intestines. This is the responsibility of the cell Case-Wilmer, on whose membrane there are special proteins that transport ions of the salt to the external environment.
And you, what answers to interesting questions you would like to read on the following article?
Feel free to leave any comments here at Coolest-hacks.com