Quando jogamos uma pedra num lago tranquilo, observamos o surgimento de uma onda circular que se propaga no lago. Para pular essa leitura pressione TAB e depois F. Exemplo: Ondas sonoras na atmosfera ou em metais. Veja abaixo:. As propriedades de massa e elasticidade do meio determinam a velocidade com a qual a onda pode se propagar. Podemos classificar os meios onde as ondas se podem propagar das seguintes formas [ 11 ] :. Therefore, a calm sky has a neutral charge. Inside a thunderstorm, Create Your Own Lightning Here's a safe and easy way to make lightning.
You will need a cotton or wool blanket. This experiment works best on a dry, cool night. Turn out all the lights and let your eyes adjust to the darkness. Please log in Username: Password: Forgot password? NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. All Rights Reserved. Raul Seixas: Gita The most famous rock poet of Brazil continues to elaborate on his very personal style, this time taking a turn towards the solemn and magestic.
Jorge Mautner: Para iluminar a cidade Jorge Mautner is inspired on this odd, interesting and highly enjoyable album, where childish playfulness meets instinctive beauty and intricate intelectualism. Cartola: Cartola One of the most celebrated and elegant samba composers of Rio de Janeiro presents some of his most famous songs, several of which have been recorded and performed by countless Brazilian artists through the years.
Chico Buarque: Sinal Fechado A classic album where Chico Buarque mostly performs songs by other artists, as he was forbidden to write his own music, by the conservative military regime who governed Brazil at the time.
Nevertheless amusical gem by any standards. Gilberto Gil: Ao Vivo Gilberto Gil shows his most inspired and consistent side on this comparatively unknown, but highly enjoyable live album. Five excellent "bonus" tracks were added to the CD release of the album. Elis Regina e Tom Jobim: Elis e Tom A truly masterful recording where two of Brazil's most famous and celebrated artists - composer Tom Jobim and singer Elis Regina, both appearing at their absolute best.
A highly sophisticad and elegant, yet very warm album, graced with an excellent production as the icing on the cake. Arnaldo Baptista: Loki? His personal struggles are reflected on this strange but beautiful rock album. Definitively one of the essential albums of the MPB genre. Secos e Molhados: Secos e Molhados The second and last album of legendary Secos e Molhados continues in the veine as the group's first recording, from Gilberto Gil: Refazenda Lovely music on one of Gilberto Gil's most conistent studio albums, showing him at his most creative and spirited self.
Laid back, free flowing and elegant music, with an excellent production to top it all off. Di Melo: Di Melo A landmark album in the samba-soul genre. Charming, funky, melodious, rhythmic and danceable music - completed with some real high class lyrics. Highly essential. The magic materialize in the space inbetween the simplistic production, warm and elegant melodies and sheer poetry in the lyrics. Tim Maia: Racional One of the most higly regarded moments of Brazilian soul. Though clearly under the influence of the Universo em Desencanto sect, Tim Maia never sounded more vibrant, crisp and soulful in his singing and his music was never more passionate and funky.
Walter Franco: Revolver Walter Franco creates nuances and rhythms in each song by repeating melodic and lyrical lines over and over again. Very peculiar, very interesting and very enjoyable album on the borderlines between MPB and rock. Arnaud Rodrigues: Som do Paulinho Another excentric musician, Arnaud Rodrigues, in his own distinctive way mixes samba, rock, pop and other musical styles in a free flowing, musical mosaic.
Marku Ribas: Marku This, the second album of Marku Ribas, is just as strong as his first album and he continues in the same way, uniting and building on the sounds and styles of Tim Maia and Jorge Ben. Cartola: Cartola Classic recording of hugely popular samba comoser Cartola, in his own voice presenting some of his compositions. Super Mulher Jorge Mautner 2. Olhar Bestial Jorge Mautner 3. Estrela da Noite Jorge Mautner 4.
Chuva Princesa Jorge Mautner 5. Anjo Infernal Jorge Mautner 6. Quero Ser Locomotiva Jorge Mautner 7. Sheridan Square Jorge Mautner 8. En , Theodore H.Há uma sequência de vídeos contando a história da banda em forma de documentário que é simplesmente sensacional, mas esse ressurgimento da banda tanto tempo depois, tem nomes e sobrenomes, os quais faço questão de mencionar, pois é o mínimo que podemos fazer, além de comprar essa raridade de álbum, portanto, cito o Nelsinho Laranjeiras, baixista e compositor, que liderou a .