A Casinha da Matemática

A Álgebra é generosa; ela frequentemente dá mais do que aquilo que lhe é pedido. (D'Alembert)

A Casinha da Matemática Blog

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Matemática / Ciência e Tecnologia / Astronomia

Poema para Galileu

A Queda Livre – Galileu Descreve o Movimento
Parte 6 de 6 da série A mecânica de Galileu

Poema para Galileu

 

 

 

Diz a minha mãe que eu comecei a fazer versos aos 5 anos e aos 10 tive a comoção de ver os primeiros impressos e públicos.
Escrever poemas foi sempre para mim um estado de angústia, um sofrimento autêntico. Amorteci todo esse sofrimento durante anos até ao dia em que por motivos dolorosos me desfiz dele por completo na ingénua presunção de que me atrapalhava. Sobre isso

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Matemática / Ciência e Tecnologia / Astronomia

Soluções dos Desafios

A Queda Livre – Galileu Descreve o Movimento
Parte 5 de 6 da série A mecânica de Galileu

Soluções dos Desafios

 

Desafio 1

Houve muitos trabalhos que antecederam o de Galileu, no que diz respeito ao movimento. No período de 1280 a 1340, matemáticos de Merton College, em Oxford, meditaram cuidadosamente sobre diversas grandezas que variavam com o tempo. Um teorema geral, conhecido por “Teorema de Merton” ou “Regra da Velocidade Média”, resume um resultado que se mostrou de grande importância.

Este teorema, … Ler mais

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Astronomia / Matemática / Ciência e Tecnologia

Galileu descreve o movimento

A Queda Livre – Galileu Descreve o Movimento
Parte 4 de 6 da série A mecânica de Galileu

Galileu descreve o movimento

Galileu e o seu tempo

Óleo sobre tela por Justus Sustermans. Pintado em 1636 e oferecido por Galileu a um amigo em Paris. Mais tarde fez parte da coleção de Ferdimnado II de Medici; na Galeria degli Uffizi, Firenze, desde 1678.

Galileu Galilei nasceu em Pisa em 1564 – o ano da morte de Miguel Ângelo e do nascimento de Shakespeare. Filho de um nobre … Ler mais

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Astronomia / Matemática / Ciência e Tecnologia

A teoria aristotélica do movimento

A Queda Livre – Galileu Descreve o Movimento
Parte 3 de 6 da série A mecânica de Galileu

A teoria aristotélica do movimento

O modelo de Universo de Ptolomeu era essencialmente o aristotélico, ou seja, um cosmo finito, constituído de esferas concêntricas, com a Terra imóvel no centro. A atmosfera chegaria até a altura da Lua, definindo o espaço do mundo “sublunar”, constituído por quatro elementos, Terra, Água, Fogo e Ar. A partir da esfera da Lua, no mundo “supralunar”, constituído de um “quinto elemento”, o Éter, haveria … Ler mais

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Matemática / Ciência e Tecnologia / Astronomia

O Museu Galileu

A Queda Livre – Galileu Descreve o Movimento
Parte 2 de 6 da série A mecânica de Galileu

Museu Galileu – Instituto e Museu da História da Ciência

O prédio que abriga o museu é o Palazzo Castellani, que surgiu na região do Castello d’Altafronte – datado de finais do século XI, era a fortaleza que protegia o porto fluvial no Arno e fazia parte da cerca antiga das muralhas de Florença. Está localizado entre a ponte Vecchio e a Piazza della Signoria.

O Museu da História … Ler mais

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Matemática / Ciência e Tecnologia / Astronomia

Introdução à mecânica de Galileu

A Queda Livre – Galileu Descreve o Movimento
Parte 1 de 6 da série A mecânica de Galileu

Abordaremos o desenvolvimento de um importante exemplo de investigação básica: o estudo dos corpos em queda livre feito por Galileu Galilei. Embora o problema físico da queda livre seja por si só interessante, o estudo será orientado para a maneira como Galileu, um dos primeiros cientistas modernos, apresentou os seus argumentos. A sua perspetiva do mundo, a sua maneira de pensar, o seu uso da matemática e a sua … Ler mais

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Ciência e Tecnologia / Vídeo

Every Breath We Take: Understanding Our Atmosphere

Gabrielle Walker tells the remarkable story of how we discovered that the air around us is not just empty space, it is full of hidden wonders

The air around us is not just empty space; it is an integral part of the chemistry of life. Plants are made from carbon dioxide, nitrogen nourishes the soil and oxygen gives us the energy we need to keep our hearts pumping and our brains alive. But how did we come to understand what air is made of? How did we come to know that this invisible stuff around us contains anything at all?

Gabrielle Walker tells the remarkable story … Ler mais

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Ciência e Tecnologia / Vídeo

The Genius of Design

Documentary series exploring the history of design

The Genius of Design examines the history of design, focusing on inventions – such as the ring pull and the fitted kitchen – that have transformed modern life. It tells the story of design from the Industrial Revolution through 20s modernism, the swinging 60s, the designer 80s and up to the present day. Features interviews with star designers like Philippe Starck and creatives from Apple and Ford; as well as design fans like Stephen Fry. This five-part … Ler mais

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Ciência e Tecnologia / Vídeo

Visions of the Future

Theoretical physicist and futurist Michio Kaku predicts how technology will alter our world in the 21st century

Visions of the Future is a 2007 documentary television series aired on the BBC Four television channel. The series stars theoretical physicist and futurist Michio Kaku as he documents cutting edge science.

Episode 1: The Intelligence Revolution
Theoretical physicist Michio Kaku shows how AI will become ubiquitous this century and how robots with human-level intelligence may become a reality.

Episode 2: The Biotech Revolution
Theoretical physicist and futurist Michio Kaku looks at the revolution in genetics, which promises health and … Ler mais

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Ciência e Tecnologia / Vídeo

Brian Cox – In Search of Science

Professor Brian Cox introduces Britain's science heroes

Professor Brian Cox is going in search of the best of British science. Introducing his science heroes, Brian visits the places where they made their discoveries, recreating their experiments and examining their legacy to their scientific descendants. He finds that this tradition of innovation and discovery owes everything to the early pioneers – but he also exposes the often surprising themes that define modern science; how the business of discovery and innovation is a process of creative inspiration, collaboration and … Ler mais

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Ciência e Tecnologia / Vídeo

The Science of D-Day

Engineer Rob Bell explores the new inventions - from giant troop-carrying gliders to tanks that could operate on water - that made the Normandy invasion in 1944 possible

In June 1944, one of the greatest amphibious assaults in history was launched from the south coast of England. Within a matter of hours, 7,000 vessels had landed 156,000 troops on the beaches of Normandy. It was a manoeuvre that changed the course of the war and tested innovations in science and engineering for the first time.

In this programme, engineer Rob Bell looks at the nuts and bolts which made such a staggering invasion possible – from giant … Ler mais

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Matemática / Ciência e Tecnologia / Vídeo

Beautiful Young Minds

Documentary following a group of brilliant teenagers as they fight to become the chosen six to represent the UK at the International Mathematical Olympiad

As part of the Kidult season, this documentary tells the story of some of the brightest mathematical brains of a generation. Each year, exceptionally gifted teenagers from over 90 countries compete for medals at the International Mathematical Olympiad. The film follows a group of brilliant teenagers as they battle it out to become the chosen six selected to represent the UK.

Many youngsters see maths as an ordeal, but for these teenagers it’s a passion they are completely devoted … Ler mais

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Vídeo / Ciência e Tecnologia

The Growing Pains of a Teenage Genius

Documentary about 13-year-old Cameron, a socially-awkward maths genius with Asperger Syndrome who is trying to balance his ability with the classic teenage longing to be accepted

What do you do when your child is gifted and their academic ability has overtaken yours? In a lot of ways 13-year-old Cameron Thompson is a normal teenage boy – obsessed with computer games, sporting the first hints of a moustache and a newfound interest in girls. But he is also a maths genius who is currently doing an Open University degree in applied mathematics and it is this ability that has singled him out. That, and an intense social … Ler mais

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Ciência e Tecnologia / Vídeo

Dial “B” for Britain: The Story of the Landline

From early call boxes to the Post Office Tower, Timeshift tells the story of how Britain's phone network was built over the course of 100 years, and its impact on the public

Timeshift tells the story of how Britain’s phone network was built. Incredibly, there was once a time when phones weren’t pocket-sized wireless devices but bulky objects wired into our homes and workplaces. Over the course of 100 years, engineers rolled out a communications network that joined up Britain – a web of more than 70 million miles of wire. Telephones were agents of commercial and social change, connecting businesses and creating new jobs for Victorian women. Wires changed the appearance … Ler mais

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Vídeo / Ciência e Tecnologia

Secrets of Silicon Valley

Jamie Bartlett uncovers the dark reality behind Silicon Valley's glittering promise to build a better world

Tech writer Jamie Bartlett investigates the reality behind Silicon Valley’s endless faith in its power to change the world for the better. The Tech Gods believe progress is powered by unleashing technology to tear up the world as it is and create a new one – a process they call “disruption”. This series uncovers the true scale of Silicon Valley’s global disruption – across economies, societies and democracies – driving the vast rewards flowing to the Tech … Ler mais

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Ciência e Tecnologia / Vídeo

Panorama: What Facebook Knows About You

Facebook knows more about us than any other company in history, but we know very little about how Facebook works or what it does with our personal information

Facebook knows more about us than any other company in history. But we know very little about how Facebook works or what it does with our personal information. The company created by Mark Zuckerberg to connect people and share information is a secretive black box. Facebook is fighting to protect its own privacy even as it extends its reach into every corner of our lives in every corner of the globe. It faces two major court cases, which threaten to … Ler mais