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Adults questions
There will always be questions that will tantalize your head to the end of life. Usually, they can not come up with a logical explanation. Below we provide you with answers to ten questions that are sure to torment you, but you have not been able to find an answer.
10. Why do airplanes ashtrays, if there are non-smoking?
Almost all the world's airlines prohibit smoking on board. Besides the fact that cigarette smoke is unpleasant to others, smoking also has a high risk of fire and it was probably a cigarette caused the fall flight Varig Flight 820. However, I'm sure many have noticed an ashtray located in the toilets aircraft. The fact that this is one of the requirements of the Federal Aviation Administration. Even despite the ban, there will always be someone who will definitely decide to smoke.
9. What books have blank pages?
A huge number of printed books coming out with one or more blank pages. In fact, these pages do not have any oversight by the publisher, and as a result of the features of the printing process. As a rule, the book pages are printed on huge sheets of paper, on which can be located on the 8, 16 or 32 pages at once. After printing the sheet is cut and folded into a book. Not what the book will have a number of pages that is divisible by 8, and hence there are blank pages as a residue.
8. Why do people sneeze, looking at the bright light?
About a third of the world's population necessarily sneeze at the entrance in a bright room. This strange phenomenon baffled scientists for thousands of years. In fact, sneezing - a response that occurs due to irritation of the nasal mucosa. In our case, the nasal mucosa is irritated in bright light. This may be due to the fact that the optic nerve is located very close to the trigeminal nerve, responsible for sneezing. When an electrical pulse is the optic nerve to the brain, it may hit the trigeminal nerve, causing the brain to think that the nasal mucosa is exposed to irritation resulting in sneezing occurs.
7. Why does hair turn gray?
It happens to everyone. With approximately 30 years of age, our hair begins to lose its natural color, gradually Sede. Despite the commonness of the phenomenon, its causes and remain poorly understood. The natural color of our hair cells transmit the melanocytes, with age they begin to degrade, producing less and less pigment. Finally, the cells cease to work at all, which leads to complete bleaching of hair.
6. Why is the entrance to the store we ventilation air?
It is quite common for large stores and shopping centers. This system is used in restaurants, factories, shops and loading bays. The main purpose of this action - to maintain a constant temperature in the building of the air, preventing air from entering from the street at the entrance. This practice is especially useful if the door must remain open institutions. Thus, the flow of warm air in winter and cool in the summer protects the internal temperature of the institution from sudden changes. In addition, through the "air door" does not get insects and debris from the street.
5. Where are the butterflies in your stomach?
All readers have ever experienced in my life definitely a feeling of "butterflies fluttering in my stomach." This feeling can occur for various reasons, among which are the feelings of fear and strong emotional experiences. These feelings release an extra dose of adrenaline, increasing blood flow to the heart, lungs and muscles. Since the amount of blood in the body is limited, our digestive system loses its certain amount of reacting to it in this way.
4. Why rubbing alcohol burns the skin?
Man uses rubbing alcohol for the treatment of cuts and wounds in a very long time. If you've ever done it, too, we could note that often spill alcohol on the skin can be more painful than the cut. This happens not because alcohol kills bacteria, but because of the reaction it causes in the body. After contact with skin, it irritates the receptors VR1, responsible for determining the temperature. Usually they are activated at high rates, but alcohol lowers the threshold of sensitivity to body temperature. Receptors believe that the body is exposed to excessive temperatures, and transmit to the brain the sensation of pain.
3. Why after brushing orange juice becomes disgusting taste?
Eat or drink immediately after brush your teeth - not the most pleasant experience. However, in the case of orange juice, taste it may seem like the most disgusting of all that you have tried. This happens because the blowing agent used in most modern toothpastes. Sodium lauryl sulfate is temporarily blocks the receptors responsible for recognizing sweet taste but also destroys phospholipids which usually help prevent excessive sensation of bitterness in the mouth. These two effects and give such a disgusting taste orange juice.
2. Why is the sky blue?
On clear days, the sky always seems blue. This occurs because, as some substances interact with the light. White sunlight passes through the nitrogen and oxygen molecules which dissipate its seven colors. Since the blue color is the shortest wavelength, and then it is dissipated more. This phenomenon explains the appearance of other colors in the sky. Closer to the horizon the sky will look much paler, this is because the light is passed through more air, more scattered.
1. Why are dreams so hard to remember?
Each of us was once woke up after a delicious sleep and struggled to reproduce it in its memory a few moments later. Unfortunately, even with the aid of special techniques dreams memory can hold only a few minutes. Scientists believe that there are several reasons as to why we are not able to remember dreams. One of them is that the conditions in which the brain is at bedtime, do not allow the waking dream move to long-term memory. In addition, the lack of a hormone called norepinephrine, responsible for the work of long-term memory, also plays a role. Another reason may be the fact that during REM sleep neurons from the hippocampus do not work adequately, that does not allow them to transmit information to other neurons, supplying a dream and not stored in memory.
10. Why do airplanes ashtrays, if there are non-smoking?
Almost all the world's airlines prohibit smoking on board. Besides the fact that cigarette smoke is unpleasant to others, smoking also has a high risk of fire and it was probably a cigarette caused the fall flight Varig Flight 820. However, I'm sure many have noticed an ashtray located in the toilets aircraft. The fact that this is one of the requirements of the Federal Aviation Administration. Even despite the ban, there will always be someone who will definitely decide to smoke.
9. What books have blank pages?
A huge number of printed books coming out with one or more blank pages. In fact, these pages do not have any oversight by the publisher, and as a result of the features of the printing process. As a rule, the book pages are printed on huge sheets of paper, on which can be located on the 8, 16 or 32 pages at once. After printing the sheet is cut and folded into a book. Not what the book will have a number of pages that is divisible by 8, and hence there are blank pages as a residue.
8. Why do people sneeze, looking at the bright light?
About a third of the world's population necessarily sneeze at the entrance in a bright room. This strange phenomenon baffled scientists for thousands of years. In fact, sneezing - a response that occurs due to irritation of the nasal mucosa. In our case, the nasal mucosa is irritated in bright light. This may be due to the fact that the optic nerve is located very close to the trigeminal nerve, responsible for sneezing. When an electrical pulse is the optic nerve to the brain, it may hit the trigeminal nerve, causing the brain to think that the nasal mucosa is exposed to irritation resulting in sneezing occurs.
7. Why does hair turn gray?
It happens to everyone. With approximately 30 years of age, our hair begins to lose its natural color, gradually Sede. Despite the commonness of the phenomenon, its causes and remain poorly understood. The natural color of our hair cells transmit the melanocytes, with age they begin to degrade, producing less and less pigment. Finally, the cells cease to work at all, which leads to complete bleaching of hair.
6. Why is the entrance to the store we ventilation air?
It is quite common for large stores and shopping centers. This system is used in restaurants, factories, shops and loading bays. The main purpose of this action - to maintain a constant temperature in the building of the air, preventing air from entering from the street at the entrance. This practice is especially useful if the door must remain open institutions. Thus, the flow of warm air in winter and cool in the summer protects the internal temperature of the institution from sudden changes. In addition, through the "air door" does not get insects and debris from the street.
5. Where are the butterflies in your stomach?
All readers have ever experienced in my life definitely a feeling of "butterflies fluttering in my stomach." This feeling can occur for various reasons, among which are the feelings of fear and strong emotional experiences. These feelings release an extra dose of adrenaline, increasing blood flow to the heart, lungs and muscles. Since the amount of blood in the body is limited, our digestive system loses its certain amount of reacting to it in this way.
4. Why rubbing alcohol burns the skin?
Man uses rubbing alcohol for the treatment of cuts and wounds in a very long time. If you've ever done it, too, we could note that often spill alcohol on the skin can be more painful than the cut. This happens not because alcohol kills bacteria, but because of the reaction it causes in the body. After contact with skin, it irritates the receptors VR1, responsible for determining the temperature. Usually they are activated at high rates, but alcohol lowers the threshold of sensitivity to body temperature. Receptors believe that the body is exposed to excessive temperatures, and transmit to the brain the sensation of pain.
3. Why after brushing orange juice becomes disgusting taste?
Eat or drink immediately after brush your teeth - not the most pleasant experience. However, in the case of orange juice, taste it may seem like the most disgusting of all that you have tried. This happens because the blowing agent used in most modern toothpastes. Sodium lauryl sulfate is temporarily blocks the receptors responsible for recognizing sweet taste but also destroys phospholipids which usually help prevent excessive sensation of bitterness in the mouth. These two effects and give such a disgusting taste orange juice.
2. Why is the sky blue?
On clear days, the sky always seems blue. This occurs because, as some substances interact with the light. White sunlight passes through the nitrogen and oxygen molecules which dissipate its seven colors. Since the blue color is the shortest wavelength, and then it is dissipated more. This phenomenon explains the appearance of other colors in the sky. Closer to the horizon the sky will look much paler, this is because the light is passed through more air, more scattered.
1. Why are dreams so hard to remember?
Each of us was once woke up after a delicious sleep and struggled to reproduce it in its memory a few moments later. Unfortunately, even with the aid of special techniques dreams memory can hold only a few minutes. Scientists believe that there are several reasons as to why we are not able to remember dreams. One of them is that the conditions in which the brain is at bedtime, do not allow the waking dream move to long-term memory. In addition, the lack of a hormone called norepinephrine, responsible for the work of long-term memory, also plays a role. Another reason may be the fact that during REM sleep neurons from the hippocampus do not work adequately, that does not allow them to transmit information to other neurons, supplying a dream and not stored in memory.
