Analise as afirmativas abaixo no que se refere às ondas sonoras.
I - A intensidade do som está relacionada à frequência das vibrações das moléculas do meio e é a qualidade pela qual um som forte se distingue de um som fraco.
II - A potência de uma fonte, que emite ondas sonoras isotropicamente, não depende do meio que o som se propaga e nem da distância do observador à fonte.
III - Para sons de mesma frequência, a percepção auditiva humana cresce linearmente com o aumento da intensidade do som.
IV - Se em certa distância de uma fonte sonora o nível sonoro aumenta de 15 dB, então a intensidade sonora aumentou de um fator igual a 10 √ 10 .
V - Uma onda sonora consiste numa compressão seguida de uma rarefação do meio em que se propaga. A distância entre uma compressão e uma rarefação sucessivas é o comprimento de onda da onda sonora.
Assinale a opção que contém apenas as afirmativas corretas:
Social engineering: here's how you _______ be hacked
Lean how social engineering ________ affect you, plus common examples to help you identify and stay safe from these schemes.
Social engineering is an important term in the security world, but you _______ not be familiar with exactly what it means. While it is a broad subject, there are specific types of social engineering that we _______ examine to leam more. Let's look at social engineering as a concept so you _______ avoid falling victim to it. Social engineering is the act of manipulating people to steal private information from them, or make them give up such confidential details. (Adapted from https:/Avww.muo.com)
“A quem preconiza o sábio limite das despesas, porque “vintém poupado, vintém ganhado”, replicará o vizinho farrista, com razão igual: “Da vida nada se leva.” (1º§)
Marque a opção em que a reescritura do trecho citado mantém o seu sentido original e respeita a norma-padrão da língua.
According to this article, everybody in costal cities _____ (1)find a way to escape from the 2012 tsunamis.
When you stay (1) after midnight, your attention surely (2).
Too many third graders can’t read this sentence
9 Feb. 2017- Editor's Picks
Two-thirds of U.S. third graders face challenges that will impact their future, including academic struggles that could lead to dimmer academic and career prospects. Sadly, only one in three U.S. students demonstrates reading proficiency at the end of third grade. This has alarming consequences for these children, and for our country.
A report released today from the Business Roundtable (BRT) sheds light on this troubling trend in American education, and advises business leaders on how they can help put more children on a path to success.
(...)
I’ve heard it said that before third grade, students are learning to read, while after third grade, they’re reading to learn. Grade three is a critical crossroads in a life's journey. If you’ve read this far, then you understand why this is so important. Not enough of our young learners can say the same.
I encourage you to read the BRT report. As you read, please consider ways to help our schools and our teachers keep students on paths to bright futures.
Leave your comments below
Michel Jonas
Really, all I read was blabla wa wa wa. Are you Charlie Brown’s teacher? If we can't understand our children who are crying out for help and direction, then there is something wrong with you. Please go back and check yourself! They are worth so much more.
Rick Shire
Thanks for sharing. With two young children, I increasingly think about the importance of early childhoodeducation. Pre-k care is far too inaccessible, ultimately magnifying inequality from the earliest stages of life.
Tom Franks
What exactly is education? Academic education doesn't make someone a better person or even a better employee, I would guess that anything we learn in the education process is at the most 10% useful to us as people. Education should teach academia but also life skills such as budgeting, EQ skills, languages etc., all the elements to be a successful person and not necessarily a successful professional.
(Adapted from https ://www.linkedin.com)
Decide if the statements below are true (T) or false (F) according to the text. Then choose the option that contains the correct sequence.
( ) Most kids in American schools cannot read well enough at third grade.
( ) The BRT report does not include suggestions on how to improve education.
( ) Michel Jonas posted a positive comment about the matter.
( ) Tom Franks believes schools do not prepare us for life.
As the Olympics Approaches, a Lesson in Overcoming Adversity
Bert R. Mandelbaum, MD
July 20, 2016
I've known a lot of athletes who qualified for the Olympic Games ,______injuries. But I know of only one who qualified because of an injury.
Cliff Meidl’s story captures the spirit of the Olympics.
In November 1986, Cliff, a 20-year-old plumber's apprentice, hit three buried high-voltage electrical cables with a jackhammer. An estimated 30,000 volts surged through his body, exploding bone and cartilage from the inside ail the way up to his head. To put that into perspective, electric chairs use only 1500-2000 volts for executions. So it's safe to say that Cliff should have died.
And he nearly did. His heart stopped. Paramedics were able to get it going again, but they had to resuscitate him on the way to the hospital.
As part of a team with renowned plastic surgeon Malcolm Lesavoy, MD, and others, I got to work reconstructing Cliffs legs. Our best hope was to avoid amputation.
But very quickly, we noticed something else going on - something that had nothing to do with our expertise. Through every step of his painful rehabilitation, Cliff grew more and more determined. He never complained. He just asked, "What's next?"
Before he had even finished the rehabilitation, Cliff started paddling various watercrafts. The days spent on crutches had already strengthened his upper body, and he took naturally to the sport. The same year in which he was injured, he began competing in canoe and kayak events, and in 1996 he qualified for the Olympics - not the Paralympic Games, the Olympic Games.
Four years later, in Sydney, Australia, I was overseeing the sports medicine team at the Olympic soccer tournament. I was sitting in the stands during the opening ceremonies when Cliff walked into the Olympic Stadium carrying the Stars and Stripes.
It's a long-standing tradition for delegations of athletes to select one among their number to bear the flag, and the choice often symbolizes some extraordinary accomplishment. I had no idea that Cliff would be selected. So when he strode into the stadium with a normal gait, I nearly broke down.
Moments like that reinforce what I have always believed: that sport can bring out the best in us all.
The Olympic Games (...) are devoted to celebrating the human capacity to improve body, mind, and soul.
They are about taking part - not necessarily about winning. Cliffs peers in the US delegation of 2000 recognized that when they elected him to bear the nation's colors. He never won a medal at the games, but the spirit with which he overcame adversity inspired all of them.
The Olympic motto - faster, higher, stronger - can help our patients realize that the real victory is the "win within." The Win Within: Capturing Your Victorious Spirit is the name of the book I wrote to show people that coming back from adversity is part of our heritage - that we as humanbeings are more adapted to adversity than we are to success.
Adversity is the engine of unimagined opportunity. It can unleash our energy and stimulate our will. It moves us to succeed. If I don’t have food, I have to go get some. If I’m cold, I have to build a shelter.
I remind patients who don't participate in sports that they have the heritage of athletes. We all have the genes of pursuit-hunters who survived by running down their prey and running away from their predators. That's why even now, in 2016, when we go out and take a run, we feel good. We get an endorphin surge and our lipids go down. Our hearts and brains become clear.
The life of sport and sport of life are interlinked. Exercise is our birthright; it's our legacy; it's why we are here.
We no longer have to fear saber-toothed tigers or cave bears. But when you look today at how people can be successful in 2016, it's by avoiding the predators in our urban life: overeating, inactivity, and smoking. And it's by rising to meet adversity.
(Adapted from http ://www.medscape.com/viewarticle/866279)
l She has a ______ job. Il- I enjoyed the movie at first, but after a time I got _______ with it. Ill- I was ______ at her knowledge of literature. IV- Which do you find more _______, traveling by car or by bus?
Which option completes the sentences correctly?
“Esta contemporânea de La Valliêre, que o artista anônimo perpetuou na madeira da cadeirinha, não se parecia muito com aquela meiga vitima da régia concupiscência, [...] (1º§)
Marque a opção em que, diferentemente da frase acima, NÃO se observa um elemento que faça com que a próclise do pronome átono destacado seja preferível, respeitando-se a norma culta da língua.
Based on the text below, answer the question.
Navy preps submarines for lst female officers
Considering the text, what does the word "magnified" mean in this extract?
"I have a feeling more people will be focused on us. Our mistakes and successes will be magnified more than they deserve."
What is the correct way to complete the sentence below?
I'm going to leave early tomorrow in case (1)___ a lot
of traffic.