Frequently asked questions - why? (6 photos) Bashny.Net

A small selection of interesting facts, frequently asked questions.
Read and raise your intelligence.

Why is the speed at sea is measured in knots?



To determine longitude, ancient mariners was calculated how far they sailed over a certain period of time. To do this, they used a special device - "lag". It was an ordinary timber, which tied a rope. Lag thrown overboard from the stern of the ship and waited rope stretches.

At regular intervals throughout the length of the rope are tied nodes. Sailor, dropping the rope, I count how many sites have passed through his hands for some time. So the ship's speed was calculated. Sailors began to use the word "node" to indicate the speed of the vessel.

Today knot equals one nautical mile per hour, and nautical mile - is 1852 meters - a little more than a land mile. Suppose the ship sails at a speed of 15 knots. This means that it floats at 15 nautical miles per hour (or 28 kilometers) per hour.

Why the New York police was the "star»?

New York police in a few days was the "star" of the Internet simply because they felt sorry for the homeless and gave him a warm winter shoes and socks. This story saw tourist Jennifer Foster; she took the time for giving gifts tramp seen and described her case in the network. Later, the story and the photograph came to the police department, and were published on their page on Facebook.


According to the tourists on November 14, she was walking with her husband on Times Square. Near one of the shops sat unshoed tramp with torn trousers and asked passers detail. She decided to share coins with the homeless, when he suddenly saw a police officer, giving the boots and socks this lonely, shivering man.

Generous police officer Larry Deprima decided to go to a nearby shop Skechers and bought for $ 75 a pair of warm boots size 12 and two pairs of wool socks. He then returned to the homeless, and sitting down, put him on his knees gift. "Let's put them to you," - quietly suggested Deprima. He helped put shoes on the stroller, then got up and walked away, not knowing that it was shot on camera.

As the store manager Skechers Jose Cano, the tramp was surprised by the unexpected gesture representative of law and order. "His face broke into a smile from ear to ear as if he was handed a million dollars", - he added. Kano police made a discount, reducing the price to $ 75, after learning to whom the things. Check the purchase, he still keeps in his pocket in the memory of this wonderful event.

Why is sea water salty?

Scientists suggest that during the formation of the crust and mantle of the ocean along with the water vapor allocated acidic volcanic fumes containing chlorine, fluorine, bromine. The first "batch" of water on Earth were acidic. This is the primary water destroyed the newly formed basalt, granite and other crystalline rocks of the crust and extract alkaline - sodium, magnesium, potassium, calcium and others. A chemical reaction in which the alkaline compound included in the chlorine, fluorine, bromine and the solution was neutralized.


Over time, the flow of acidic volcanic fumes becoming less and selection of salts from the rocks land continued. And, then, and the ocean water is gradually accumulated salt and acquires an alkaline reaction, which is inherent in it now. And somewhere in the 500 million years ago the ocean water stabilized by salt composition and content of the gases in it.

Of course, this is just one of the points of view of scientists, but it has a right to exist, because until now no one really can not answer that question, and all the theories about the origin of the ocean and our planet's only and remain theories, because no one of us you did not live in the old days!

Why during takeoff and landing should be open shutter windows?

According to the rules of safety, during taxi, take-off and landing shutter windows are open. The fact that it is at these stages of air transport accounts for the largest number of accidents. Therefore, attention is paid to safety.


First, your eyes have to get used to natural light, thanks to this you will be able to see better in the event of an emergency. You've probably noticed that the take-off / landing is also turned off and the main lighting in the cabin.

Second, the cabin crew or the passengers can see what's happening behind. This will allow time to report an emergency situation or to evaluate the crew during the evacuation position behind. For example, see if there is a fire or not. In addition, in the event of an emergency landing through the portholes rescuers will be able to see what is happening in the cabin.

Well, and thirdly, to ensure that passengers do not hurt yourself. After a hard landing in the plastic curtain may break and cause damage to the face by shrapnel.
By the way, that will break the windows themselves, can not survive. It consists of a 2/3-x / x layer glazed. At the same power, that is able to withstand pressure differentials are two windows simultaneously. Illuminators are designed so that they can withstand the pressure between the cabin and the outside atmosphere, comparable with a load of up to 4 tonnes. The inner glass window, which saw passengers inside the cabin, is decorative. His injury will not affect the security of being in a plane.

Why is the name of a sweater?

Knitted wool sweater as we know it appeared in Europe in the 19th century. Initially, it was recommended by physicians as the slimming clothes, as promoted perspiration during exercise. It was from the English verb to sweat, which means "sweat" was the name of the sweater.


Why is the 12th month of December is called?

Year in the ancient Roman calendar, in force until the Julian calendar, began in March and of the months of the year was just named in a row, starting from the first of the month - March. These names have survived. Since September (september) in Latin - the seventh, October (october) - Eighth November (november) - the ninth and December (december) - the tenth.
We say these words only names of the months, and imagine what it was like the ancient Romans Julius Caesar after the introduction of the new calendar, and the transfer of reference beginning of the year in January.