THERE was once a Prince who wished to marry a Princess; but then she must be a real Princess. He traveled all over the world in hope of finding such a lady; but there was always something wrong. Princesses he found in plenty; but whether they were real Princesses it was impossible for him to decide, for now one thing, now another, seemed to him not quite right about the ladies. At last he returned to his palace quite cast down, because he wished so much to have a real Princess for his wife. One evening a fearful tempest arose, it thundered and lightened, and the rain poured down from the sky in torrents: besides, it was as dark as pitch. All at once there was heard a violent knocking at the door, and the old King, the Prince's father, went out himself to open it. It was a Princess who was standing outside the door. What with the rain and the wind, she was in a sad condition; the water trickled down from her hair, and her clothes clung to her body. She said she was a real Princess. "Ah! We shall soon see that!" thought the old Queen-mother; however, she said not a word of what she was going to do; but went quietly into the bedroom, took all the bed-clothes off the bed, and put three little peas on the bedstead. She then laid twenty mattresses one upon another over the three peas, and put twenty feather beds over the mattresses. Upon this bed the Princess was to pass the night. The next morning she was asked how she had slept. "Oh, very badly indeed!" she replied. "I have scarcely closed my eyes the whole night through. I do not know what was in my bed, but I had something hard under me, and am all over black and blue. It has hurt me so much!" Now it was plain that the lady must be a real Princess, since she had been able to feel the three little peas through the twenty mattresses and twenty feather beds. None but a real Princess could have had such a delicate sense of feeling. The Prince accordingly made her his wife; being now convinced that he had found a real Princess. The three peas were however put into the cabinet of curiosities, where they are still to be seen, provided they are not lost.

Enunciado:

Wasn't this a lady of real delicacy?

(UNESP) Ao se espalharem pelo território brasileiro, esses protestos evidenciaram características do espaço geográfico próprias do atual período histórico da globalização. Entre essas características pode-se mencionar

Pesquisas na área nuclear são desenvolvidas no Brasil desde a década de 1960 e as reservas de urânio existentes permitem que o nosso país seja autossuficiente em combustível nuclear. A produção de energia em um reator nuclear ocorre através da reação, por exemplo, entre um núcleo de urânio-235 e um nêutron com energia adequada. Desta reação são formados, com maior probabilidade, os nuclídeos criptônio-92 e bário-142, além de três nêutrons que permitem que a reação prossiga em cadeia.

            O urânio-235 ocorre na natureza e decai em várias etapas, através de transmutações sucessivas e formação de vários radionuclídeos intermediários, com meias-vidas que variam de fração de segundos a séculos, e com emissão de radiação em cada etapa. Este processo recebe o nome de série radioativa do urânio-235. Esta série termina com a formação do isótopo estável de chumbo-207, gerado na última etapa, a partir do decaimento por emissão de partícula alfa de um elemento radioativo com meia-vida de 5 x 10^–3 segundos. 

O nome da reação que ocorre no reator nuclear para geração de energia e o elemento gerador do chumbo-207 por emissão de partícula alfa são, respectivamente, 

(UERN) Em um circuito, denomina-se nó ao ponto onde as correntes se dividem ou se unem e denomina-se malha um percurso fechado qualquer de um circuito.Com base nos conhecimentos sobre as Leis de Kirchhoff, marque com V as afirmativas verdadeiras e com F, as falsas.

( ) Fazendo-se um percurso fechado qualquer em um circuito, a soma algébrica das variações do potencial deve ser constante e não nula.

( ) A energia recebida pelas cargas, nos geradores, é igual à energia perdida, nos resistores e receptores, em um percurso fechado.

( ) A soma das correntes que chegam é igual à soma das correntes que saem, em um nó.

A alternativa que indica a sequência correta, de cima para baixo, é a

(CFTMG) A ilustração seguinte representa uma cadeia alimentar.

Nessa cadeia, os insetos classificam-se em