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As Furniture Burns Quicker, Firefighters Reconsider Tactics
House fires have changed. The New York Fire Department is rethinking its tactics for residential fires, while trying to hold on to its culture of “agressive inferior firefigthing” – charging inside burning buildings as fast as possible.
Plastic fillings in sofas and mattresses burn much faster than older fillings like cotton, helping to transform the behavior of house fires in the last few decades, firefigthers and enginners say. With more plastic in homes, residential fires are now likely to use up all the oxygen in a room before they consume all flammable materials.
“Years ago you could break a window and it took the fire several minutes to develop — or tens of minutes”, a fire battalion chief in Queens, George K. Healy, said. “Now we’re learning when you vent that window or the door,the fire is developing in say,a minute.”
LIBRADO, R. Disponível em: www.nytimes.com. Acesso em: 15 jun. 2013 (adaptado).
O texto aborda o tema dos incêndios residenciais, que se propagam com mais rapidez atualmente por causa:
Questões relacionadas
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No arranjo mostrado na figura com duas polias, o fio inextensível e sem peso sustenta a massa M e, também, simetricamente, as duas massas m, em equilíbrio estático.
Desprezando o atrito de qualquer natureza, o valor h da distância entre os pontos P e Q vale:
- Língua Inglesa | 2.01 Pronomes
(UFPR)
Forget Texting While Driving: AT&T Survey reveals drivers do a lot more with their smartphones
By Menchie Mendoza, Tech Times | May 20, 10:10 AM
Drivers who continue to use their smartphones while driving are not only distracted when they call and text. Apart from calling and texting, drivers are also browsing the Internet, tweeting, video chatting, taking selfies and sending email with their devices, according to a study by AT&T.
The research was conducted as part of the carrier's "It Can Wait" campaign launched in 2010. It hopes to increase awareness of the dangers posed by using smartphones while one is behind the wheel. The study polled U.S. residents ages 16-65 who use their smartphone and drive once or more per day.
Seventy percent of those surveyed admit they use their smartphones for a number of activities while they are driving: 61 percent say they text and 33 percent send email while they are behind the wheel. Posting or interacting on social media is also one of the most common activities that drivers engage in. Using Facebook ranks first on the list, with 27 percent of drivers logging in while driving. Other social media channels that keep drivers "multitasking" include Instagram and Twitter (14 percent) and Snapchat (11 percent).
The results also show that there is a deeper problem involved when people use social media while driving. Among those surveyed, 22 percent blame their addiction to social media.
Other revelations show 62 percent keep their smartphones within easy reach, and that 30 percent of those who post to Twitter while driving do it "all the time". Drivers also don't seem to run out of other activities using their smartphones since most apps are now easily accessed with just a simple tap. Because of this, 28 percent of drivers browse the web; 17 percent take selfies (or groupies); and 10 percent video chat.
"One in 10 say they do video chat while driving", said Lori Lee, AT&T's senior VP for global marketing. "I don't even have words for that". AT&T plans to expand the "It Can Wait" campaign in order to add more focus on the topic of texting while driving by including other driving distractions that result from using the smartphones. "When we launched 'It Can Wait' five years ago, we pleaded with people to realize that no text is worth a life", said Lee. "The same applies to other smartphone activities that people are doing while driving. For the sake of you and those around you, please keep your eyes on the road, not on your phone". AT&T will also launch a nationwide virtual reality tour in summer in order to spread the word that driving and using a smartphone don't and will never mix.
Adapted from < http://www.techtimes.com/>.
The word “they”, in boldface and italics, last paragraph, refers to:
- Geografia - Fundamental | 5.01 Estados Unidos
Observe a seguir o título de uma reportagem publicada do dia 15 de fevereiro de 2019.
Trump declara emergência nacional para construir muro com México
Disponível em: https://brasil.elpais.com/brasil/2019/02/15/internacional/1550242039_627838.html.
Acesso em: 13 maio 2019.
O empenho do presidente Trump em realizar essa construção tem como principal justificativa a sua proposta de campanha que é
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(UNIT)
Cr2O72 – (aq) + Cl–(aq) + H+ (aq) → Cr3+ (aq) + H2O(l) + Cl2(g)
O princípio da conservação de elétrons em uma reação de oxirredução é uma ferramenta importante no balanceamento de equações químicas em que ocorrem transferência e recebimento dessa partícula.
Considerando-se essa ferramenta e as técnicas adotadas no processo de balanceamento da equação química com os menores coeficientes estequiométricos inteiros, é correto afirmar:
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(Udesc) Os tecidos vegetais fundamentais são aqueles encarregados de uma série de funções, como preenchimento e sustentação. A respeito destes tecidos, analise cada proposição e assinale (V) para verdadeira ou (F) para falsa.
( ) O parênquima de reserva está presente em sementes, frutos, raízes e rizomas e tem como função o armazenamento de substâncias nutritivas.
( ) O parênquima clorofiliano é o principal tecido de preenchimento de folhas, tendo por função a realização da fotossíntese.
( ) O colênquima é formado por células vivas e é responsável pela sustentação de folhas, frutos e caules.
( ) O parênquima aquífero está presente em plantas aquáticas, auxiliando na flutuabilidade desses vegetais.
( ) O esclerênquima é formado por células mortas, impregnadas de lignina, e é responsável pela sustentação de caules em crescimento.
Assinale a alternativa que contém a sequência correta, de cima para baixo.