Ling Ling's tragedy illustrates the dangers of using a cell phone during a thunderstorm. During a thunderstorm, the flow of air in the atmosphere is accelerated, just like friction generates electricity, so that the clouds produce a large number of positive charges, while the ground produces a large number of negative charges. At this time, if there is a certain trigger mechanism, so that the positive and negative charges connected, will be in the instantaneous discharge, thus forming the sky and the ground between the discharge phenomenon, commonly known as lightning strikes. Among them, playing cell phone belongs to one of the triggering mechanisms. In another case, when the electric charge carried by the thunderstorm cloud makes the electric field in the air reach a certain strength, it begins to cause the ionization of molecules in the air, and finally develops to break through the insulating layer of the air, the positive and negative charges are neutralized by the discharge that occurs, and this kind of discharge phenomenon between the clouds and the clouds that is what people call lightning in their daily life. Because the cell phone electromagnetic wave is a very good conductor of lightning, electromagnetic wave in the humid atmosphere will form a conductive magnetic field, it is very easy to attract just formed lightning, resulting in lightning strikes.
The likelihood of a cell phone incurring a direct lightning strike is not great, but a cell phone during a thunderstorm does increase a person's risk. This is because the danger of cell phones causing induced lightning and lightning wave intrusion is greatly increased during thunderstorms. Induced lightning refers to the lightning discharge, a strong electromagnetic field so that the conductor produces electrostatic induction and electromagnetic induction, strong induction so that the metal parts of the metal parts between, produce sparks and strong heat, which burns the machine, or even cause a fire. Lightning wave intrusion refers to lightning along the outdoor wires and metal pipes into the interior, endangering personal and property safety. There have been many reports of cell phones being struck by lightning, mainly due to induced lightning and lightning wave intrusion. The use of cell phones in places with strong electromagnetic signals is often more prone to disaster.
Cell phones are a common part of our daily lives, but there are many situations in which they should not be used. In order to be safe, it is important to pay attention to these "taboos" of cell phone use.
Self-help and self-protection measures
1. When thunder, if you are in a relatively open place, you can not use the phone, so as not to attract lightning.
2. When thunder, try to turn off your cell phone and take out the battery. This is because a cell phone in an energized state is very likely to receive electromagnetic waves and attract lightning.
3. If you can't turn off your cell phone when it's thundering, you should do it, don't carry your cell phone with you, and put it on the table. If you go out, you can put your cell phone inside your school bag or bag. In short, just don't let your cell phone stick to your body.
Precautions
In order to prevent fires and explosions due to improper use of cell phones, you should also pay attention to:
1. Volatile gasoline gases are generally present in the atmosphere inside and around gas stations, and there are gasoline stains on the floor of some poorly-environmented gas stations, so that just a small spark may cause these gaseous objects to explosion. And cell phone calls instantly will have a very small spark, and if the cell phone body aging, internal circuitry short circuit phenomenon, the spark of the situation will be more serious. If the concentration of flammable gases in the air is large, it is very easy to cause an explosion. And some scholars have pointed out that the electromagnetic waves emitted by the cell phone may cause natural **** vibration phenomenon with the equipment at the gas station, generating heat and explosion. Not only gas stations, cell phones should not be used in other environments with flammable gases, such as in chemical plants, oil depots and blasting sites, where they should be turned off. The next time you go out, remember to turn off your cell phone if you pass a gas station, or any of the places listed above.
2. The electromagnetic waves emitted by cell phones can affect medical equipment in hospitals, and if a patient is having an operation and the equipment is interfered with, the situation is very dangerous and may endanger the patient's life. Therefore, it is best not to turn on the cell phone after entering the hospital.
Fire emergency alarm, fire phone 119
A city of a household home fire, then in the house of Grandma Lee, smelled a pungent burnt smell inside the house, began to think it was someone else's home frying paste the smell, and later found that the south side of the bedroom fire. Because the smoke is too big to see the road, Grandma Li was trapped, her 9-year-old grandson, Xiaoming, in the fire, immediately ran to the nearby kiosk to call the police, he calmly told the firefighters his family in which street number which house. Because of Xiao Ming's accurate call to the police, the firefighters came just in time; a few minutes later, Grandma Li would have been dead, she feared.
Xiaoming saved his family by calling the police in time. Fire will devour our own wealth, as well as public **** wealth. So learning the skill of calling the fire alarm will enable the firefighters to come to the scene of the fire relatively quickly and take measures to put out the fire, saving more social wealth and more lives.
Self-rescue self-protection measures
Dialing the fire alarm phone "119", must be calm and collected, the key is to put the situation, with as concise as possible to express the language clearly. Alarm should pay attention to the following matters:
1. calm and collected, keep a clear head, in order to take effective measures to fight and self-help. Fuzzy-headed, panic, often make a small fire into a big fire, causing major damage.
2. To remember the fire alarm phone - "119". Call to be calm and collected, if it is an outside phone, you can directly dial "119", if it is an extension phone, remember to dial through the outside line, and then dial "119", the fire quickly reported to the fire department.
3. After the phone is connected, hear the other side of the "fire department", to accurately report the address of the fire (road name, hall name, door number), what is on fire, the size of the fire, there is no one trapped, there is no explosion or gas leakage, as well as the scope of the fire, etc.. Can not say the specific address, to say the geographic location, around the obvious buildings or road signs. At this point, pay attention to the questions asked by the answering center in order to answer them correctly. To calmly answer the alarm station's questions in order to further verify the location of the fire, to prevent the alarm station did not listen to the location of the fire, the fire department can not arrive at the scene of the fire in a timely manner, and missed the opportunity to extinguish the fire.
4. Give your name, home phone number or cell phone number to the other party for contact.
5. Immediately after making the call, go to the intersection and wait for the fire truck to guide it to the fire scene quickly.
6. If there is a new change in the fire situation, inform the fire department immediately so that they can adjust the deployment of firefighting forces in time.
7. At the same time as the alarm, to send a signal or loudly call adults, so that they perceive the fire alarm, so as to actively organize the personnel to extinguish the fire, rescue people, evacuate supplies. The fire started, the burning area is small, easy to extinguish, should seize the opportunity to eliminate it in the initial stage. Never have to rely on the idea of sitting and waiting for the fire department to fight.
8. When the fire department arrives at the scene, it should report the fire situation to the commander and assist in extinguishing the fire and maintaining the order of the fire.
9. After extinguishing the fire, take measures to protect the fire scene in order to find out the cause of the fire. On the other hand, it can also prevent the rekindling of the ashes.
Precautions
To better prevent fires, children should learn some precautions.
1. Learning and mastering the scientific knowledge of fire prevention, strict compliance with fire regulations, proactive fire safety work. In fire prevention at the same time, children should master certain knowledge of fire extinguishing, learn to use and care for fire extinguishing equipment and facilities, prevention is better than cure.
2. Carefully protect the fire facilities, can not damage the fire equipment, do not occupy the fire spacing, do not block the fire escape. Keep the stairs and aisles clear, do not pile up debris on the stairs and aisles.
3. Do not carry fire into the storage of flammable and explosive hazardous materials, do not carry flammable and explosive hazardous materials into the public **** place, or take public **** transportation.
4. Fire should be reported immediately after the fire alarm.
5. Can not be for fun, false fire alarm.