Giselle Sanchez

Hindi talaga namin kinaya ang lumabas na litrato ng magaling na komedyanteng si Giselle Sanchez sa October 22, 2009 issue. Sa 'katamaran' ni Giselle na umikot sa parking area kung saan naroon ang studio entrance ng Eat... Bulaga! sa Broadway Centrum, hala... talagang nag-ober da bakod ang lola n'yo! Keber talaga siya kung mawala man ang poise!

Taken from Pinoy Parazzi

Ecosystem

an ecological community that includes all organisms which occur naturally within a specific area.

Taken from Dictionary of Science

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The term ecosystem refers to the combined physical and biological components of an environment. An ecosystem is generally an area within the natural environment in which physical (abiotic) factors of the environment, such as rocks and soil, function together along with interdependent (biotic) organisms, such as plants and animals, within the same habitat. Ecosystems can be permanent or temporary. Ecosystems usually form a number of food webs.

Taken from Wikipedia

Young's Modulus

Young's modulus (E) relates the STRESS and STRAIN in a solid (usually wire) using the following formula:

E = stress/strain = σ/ε

where σ = Force/Area and E = Change in Length/Length

Young's modulus has units of newtons per metre squared (Nm^-2) and is calculated only when the material is under elastic conditions, i.e., the force applied does not exceed the elastic limit and cause deformation.

Taken from Dictionary of Science

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In solid mechanics, Young's modulus (E) is a measure of the stiffness of an isotropic elastic material. It is also known as the Young modulus, modulus of elasticity, elastic modulus (though Young's modulus is actually one of several elastic moduli such as the bulk modulus and the shear modulus) or tensile modulus. It is defined as the ratio of the uniaxial stress over the uniaxial strain in the range of stress in which Hooke's Law holds. This can be experimentally determined from the slope of a stress-strain curve created during tensile tests conducted on a sample of the material.

Young's modulus is named after Thomas Young, the 19th century British scientist. However, the concept was developed in 1727 by Leonhard Euler, and the first experiments that used the concept of Young's modulus in its current form were performed by the Italian scientist Giordano Riccati in 1782 — predating Young's work by 25 years.

Taken from Wikipedia

Umbra

a region of complete shadow, which is usually applied to eclipses. The area of half or partial shadow is termed the penumbra.

Taken from Dictionary of Science

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The umbra, penumbra and antumbra are the names given to three distinct parts of a shadow, created by any light source. For a point source only the umbra is cast.

These names are usually used when referring to the shadows cast by celestial bodies.

The umbra (Latin for "shadow") is the darkest part of the shadow. From within the umbra, the light source is completely occluded. In astronomy, an observer in the umbra is said to be in the shadows experiencing total eclipse.

Taken from Wikipedia

Karst

a karst landscape is one created in a limestone area and which occurs due to the limestone itself. The distinctive landforms are a result of solutions moving through joints and fissures in the rock dissolving the rock, enlarging cracks and joints and creating underground waterways and caves. Features typical of a karst include networks of furrows and sharp crests, funnel-shaped hollows and eventually conical hills and steep-sided depressions of impressive scale.

Taken from Dictionary of Science