Archive for April, 2013

The Physics of Golf: What’s the Ideal Loft to Hit the Ball Farthest?

The Physics of Golf: What’s the Ideal Loft to Hit the Ball Farthest?: Everyone who plays golf knows that the driver hits the ball the farthest of any club. It also has the lowest launch angle, or “loft.” Loft is the amount that the face of the club slopes back. Clubs with high loft, such […]

The Breaking of Brittle Materials

Viewpoint: The Breaking of Brittle Materials: A model shows that as the size of a brittle material grows, the probability that it will fracture from a single crack approaches 100%. A long metal thread breaks more easily than a short one—an observation Leonardo da Vinci made in the 15th century. It all comes down to […]

Viewpoint: Toward Fractional Quantum Hall Physics with Cold Atoms

Viewpoint: Toward Fractional Quantum Hall Physics with Cold Atoms: Researchers propose new ways to recreate fractional quantum Hall physics using ultracold atoms and molecules. In the fractional quantum Hall (FQH) effect, observed in two-dimensional electron gases in a magnetic field, the resistance transverse to the current flow is quantized to noninteger multiples of h/e2. The […]

Roentgen and the discovery of X-rays

Roentgen and the discovery of X-rays: Wilhelm Conrad Rontgen, a German physicist, made an unexpected discovery while investigating the effects of cathode rays. He discovered electromagnetic radiation in the wavelength that is known as x-rays. For this remarkable achievement, he was honored with the first Nobel Prize in Physics In 1901. The following tells the […]

Physics duo discover 13 new solutions to Newtonian three-body orbit problem

Physics duo discover 13 new solutions to Newtonian three-body orbit problem: Physicists Milovan Šuvakov and V. Dmitrašinovi? of the Institute of Physics, Belgrade in Serbia have discovered using computer simulations, 13 new solutions to the three-body problem—predicting patterns that describe how three bodies will orbit around each other in space in a repeating pattern. The […]

Controversial quantum computer aces entanglement tests

Controversial quantum computer aces entanglement tests: The niobium wafers I saw are the guts of the only commercially available quantum computer, but whether their calculations truly harness the weird world of quantum mechanics has provoked heated debate. Now the chips, made by D-Wave of Burnaby, Canada, have passed two tests that suggest that the bits […]

Un Nobel dice que el progreso de la Física “se ha ralentizado”

Un Nobel dice que el progreso de la Física “se ha ralentizado” : El premio Nobel de Física 2011, el astrónomo Brian Schmidt, ha señalado que “el conocimiento científico ha sufrido un crecimiento exponencial en los últimos 25 años”, pero ha reconocido que, “ahora ese conocimiento se ha ralentizado”. Según ha explicado, la astronomía moderna tiene tan […]

Un descubrimiento crucial y una moraleja

Un descubrimiento crucial y una moraleja: La Biología se fundamenta en tres grandes obras científicas. La primera de ellas, cronológicamente, es El origen de las especies, el ensayo de Charles Darwin de 1859 en el que formula la que hoy conocemos como “teoría de la evolución por selección natural”. En su marco conceptual se entiende […]

¿Cómo funciona la homeopatía?

¿Cómo funciona la homeopatía?: Últimamente he tenido conversaciones y discusiones sobre la viabilidad o no de la homeopatía como terapia médica y sobre si se trata o no de una pseudociencia. Y para dejar las cosas claras a todos mis interlocutores, he decidido escribir esta entrada. Primero vamos a tomar algunos conceptos médicos. ¿Qué es […]

Arrugas espaciotemporales y velocidades superlumínicas II: Espaciotiempo que soporta propagación superlumínica

Arrugas espaciotemporales y velocidades superlumínicas II: Espaciotiempo que soporta propagación superlumínica: Una nave es capaz de expandir el espacio detrás de ella y contraerlo en frente suyo. Aquí tenemos dos observadores que nos ayudaran a entender la cosa mejor: Por un lado tendremos al observador externo, que verá a su alrededor un espacio plano (Minkowski). […]

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