147328 research outputs found
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Hexano
No full textNoções de funções orgânicas e ligações químicasApresenta, de forma tridimensional, a fórmula estrutural da molécula do hexano. A estrutura da fórmula se apresenta num formato 3D com o qual o usuário pode interagir utilizando o mouse para, por exemplo, rodar a imagem, fazer zoom ou mudar o aspecto visual da molécula representadaComponente Curricular::Ensino Médio::Químic
Inner gap in circumstellar disk
No full textThis image, together with the graphics, shows that it is possible to identify a star's protoplanetary disc even when it is not visibleComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Astronomi
Telelibras - entrevista com Dorina Nowill
No full textO vídeo traz uma entrevista com Dorina Nowill, fundadora da Fundação Dorina Nowill para cegos que fala sobre a importância da participação da fundação da Bienal do Livro 2008Componente Curricular::Ensino Fundamental::Séries Finais::Pluralidade Cultura
The close of Cartier's career
No full textIt is necessary to have some prior knowledge in EnglishThis audio presents the adventures of a sailor, Jacques Cartier, who was an agent of exploration for King Francis I of FranceComponente Curricular::Ensino Fundamental::Séries Finais::Língua EstrangeiraComponente Curricular::Educação Superior::Linguística, Letras e Artes::LetrasComponente Curricular::Ensino Médio::LiteraturaComponente Curricular::Ensino Médio::Língua Estrangeir
Ramsey(3,3,3)>16
No full textnoneColor the edges Kn (the complete graph on n vertices) with three colors, red, green, and blue. When the Ramsey number R(r,g,b)=n, the graph will contain either a red Kr, a green Kg, or a blue Kb, and any smaller complete graph can be colored to avoid such subgraphs.
The Ramsey number R(3,3,3) is known to be 17, so K17 cannot be 3-colored without a monochromatic triangle.
This Demonstration shows that K16 can be 3-colored to be triangle free, proving that R(3,3,3)>16. Every pair of circles is connected in exactly one of the three Clebsch graphs, which together form K16. Move the slider to permute the verticesComponente Curricular::Ensino Fundamental::Séries Finais::Matemátic
LU Decomposition
No full textIn Mathematica, the function LUDecomposition factors a matrix m into the form P L U, where P is a permutation matrix, L is a lower triangular matrix, and U is an upper triangular matrixComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Matemátic
Beats working
No full textMusicians take advantage of a phenomenon called beating when they tune their instruments to a reference pitch. If two tones are very close in pitch-but not exactly the same-their combination has a pulsating or beating quality. The rate of the beating is exactly the difference between the two frequencies. Getting in tune, for the musician, is just a simple matter of getting rid of the beats. Move the blue frequency slider to various positions and hit the "play beating tone" button to hear the beating between the blue tone and the reference red tone. The cursor slider at the bottom is there to convince you that the red and blue waveforms do indeed sum to the green, beating waveform. The blue phase slider demonstrates that the rate of the beating is not affected by the two tones' phase relationship.Componente Curricular::Ensino Médio::Matemátic
Molly make believe - 06
No full textIt´s necessary to have some prior knowledge in englishIt´s a story that shows a lesson of life. It demonstrates that people can find a reason to live even with difficultiesComponente Curricular::Ensino Médio::Língua EstrangeiraComponente Curricular::Ensino Médio::LiteraturaComponente Curricular::Ensino Fundamental::Séries Finais::Língua EstrangeiraComponente Curricular::Educação Superior::Linguística, Letras e Artes::Letra
Elliptic chords
No full textThese chords connect regularly spaced points on an ellipse. Modify the eccentricity by changing the minor axis or offset the points to be connectedComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Matemátic
Exploring cylindrical coordinates
No full textCylindrical coordinates are an extension of the two-dimensional polar coordinates along the z-axisComponente Curricular::Educação Superior::Ciências Exatas e da Terra::Matemátic