Due to its effectiveness against fire classifications a, b, and c, powder extinguishers are reffered to as abc fire extinguishers.
A fire can be controlled with the use of a fire extinguisher. Extinguishers can assist put out the fire and perhaps prevent it from continuing to burn. Some fire extinguishers, depending on their size, can be moved about and used by hand. Fire extinguishers come in a variety of sizes. Longer use is possible with larger fire extinguishers.
The weight of hand-held fire extinguishers ranges from 0.5 to 14 kg. Extinguishers of 2 kg and 12 kg weights operate for two to four to eighteen seconds, respectively. Fire extinguishers come in two primary varieties the cartridge-operated and stored-pressure. In stored pressure devices, the expellant and the actual firefighting agent are both kept in the same chamber.
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Fever 1973 by Laurie Anderson is based on the real outbreak of yellow fever. It is caused by the mosquito's bite displays the central idea of the story. Thus, option c is correct.
<h3>What is yellow fever?</h3>
Yellow fever is a viral infection that spreads because of a mosquito bite and results in fever, headache, body ache, and sometimes leads to organ failure and death.
Not all type of mosquito causes yellow fever but only the Aedes aegypti mosquito that breeds in clean water causes and transmits the virus from the infected to the normal person through the bite.
Therefore, option c. yellow fever is caused by the bite of a mosquito.
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Sweat on the surface of skin works as a cooling system because the liquid water absorbs heat from the skin surface and is transferred to the air when the water evaporates.
<h3>Why does sweating have a cooling effect?</h3>
The cooling effect on a body via sweating depends on a principle of physics known to be "heat of vaporization."
This is where it uses energy to evaporate sweat off of your skin and excess body heat is used to convert sweat into vapor and a person start to cool down.
Therefore, Sweat on the surface of skin works as a cooling system because the liquid water absorbs heat from the skin surface and is transferred to the air when the water evaporates.
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