Um astronauta afirmou que dentro da estação orbital a melhor sensação que ele teve foi a ausência de gravidade. Com relação a essa afirmação, pode-se dizer que está

Uma barra rígida, uniforme e homogênea, pesando 720 N tem uma de suas extremidades articulada no ponto A da parede vertical AB = 8 m, conforme a figura. A outra extremidade da barra está presa a um fio ideal, no ponto C, que está ligado, segundo uma reta horizontal, no ponto D da outra parede vertical. Sendo a distância BC = 6 m, a intensidade da tração (T), em N, no fio CD, vale:

Seja a função !$ f(x)= \sqrt{x+1} + \sqrt{-2x+1} !$. Os valores inteiros do domínio de f são tais que seu produto é igual a

Based on the text, all the statements below are correct except

Traveling can be a fun adventure for children. And for the little ones to really have a pleasant trip, parents should prepare themselves. Take in carry-on a coat ( it’s usually chilly on board), extra clothes (including socks), solid and easy-to-store food, games and toys that they are used to and that don’t make noise. During take-off and landing, keep the children awake and offer them, according to their age, breast milk if they are still breastfeeding, a pacifier, a bottle with water or gum to avoid the discomfort of pressurization.

GLOSSARY: carry-on = bagagem de mão

chilly = frio

easy-to-store= de fácil armazenamento

breastfeeding = amamentando

pacifier = chupeta

“used” and “to”, underlined in the text, are, respectively

Os resultados de uma pesquisa, realizada numa escola, estão apresentados na tabela:

Esporte preferido	Número de votos	Porcentagem do total de votos
Futebol	x	32%
Voleibol	y	24%
Basquetebol	z	15%
Outros	87	w

O valor de z é

Para que o sistema !$ \begin{cases} kx - y + z = 0 \\ 2x - 4y - z = 1 \\ -3x + 4y - z= -1 \end{cases} !$ seja possível e determinado, deve-se ter

Airport Delays on the Rise

a news story by CNN

Have you ever had travel problems because your airplane was late? It is a common problem and it is getting worse. Airport delays make people angry and cost the country billions in lost work time.

The Federal Aviation Administration (FAA ) is the government agency that oversees air travel. They studied the problem of airline delays.

They found eleven major problems and proposed eleven ways to fix them. Some of the problems are caused because different regions of the country do things differently. The regions don’t talk to each other enough. Some of them need new computers.

Also, too many planes are flying. A strong economy has more people using airplanes to get around. Airplanes are a form of mass of transportation now, like trains and buses were in the past. More planes in the airport cause delays.

Weather is another main reason for delays. Weather causes about 70% of delays. Fog or freezing rain can cause delays.

The first thing FAA wants to do is take control away from the regions during heavy traffic times and bad weather. A national center would make decisions on thing that affect the whole country. The FAA also wants to put more distance between planes in the sky when the weather is bad. This rule could cause even more delays.

The FAA works continuously to make sure that as many flights as possible leave on time each day. They know that their solutions will not cure the problems with airport delays. But they hope to make things better.

We can infer from the text that

Em “Joana levantou-se aborrecida naquela manhã. A atitude de suas colegas magoou-a. A decepção foi inevitável.”, os termos destacados classificam-se, respectivamente, em predicado

The Secret of Success in the US.

If you wonder why Robbie Williams and Oasis have not found success in the US, just look at their teeth. Determined not to make the same mistake, the ex – Boyzone singer now–gone–solo Ronan Keating has gotten his crooked front teeth capped in order to have a perfect smile to woo American audiences. Americans approve of artists with a perfect set of teeth such as Britney Spears, and they think that bad teeth make performers less attractive – thus making consumers less prone to buy their CDs.

GLOSSARY:

crooked – assimétrico

to woo – conquistar

prone – propenso.

You can infer from this text that