News tagged with surface area

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How to count nanoparticles

Nanoparticles of a substance can be counted and the size distribution can be determined by dispersing the nanoparticles into a gas. But some nanoparticles tend to aggregate when the surrounding conditions change. Scientists ...

Oct 11, 2011
4 / 5 (1) 0

Earth from space: Irene's eye

This week we look at two images taken simultaneously with different Envisat sensors of Hurricane Irene, which struck the US east coast last week.

Sep 02, 2011
not rated yet 0

Efficacy of cool roofs varies from city to city

(PhysOrg.com) -- While cool roofs and pavements have been found to cool the planet by preventing energy from being radiated back into the atmosphere, previous studies have not accounted for atmospheric feedbacks ...

Jul 27, 2011
4.3 / 5 (4) 5 | with audio podcast

How the mole got its 12 fingers

Polydactyly is a hereditary anomaly that is relatively common in both humans and animals. Moles also have additional fingers. In their case, however, the irregularity compared to the five-finger formula of ...

Jul 14, 2011
not rated yet 1 | with audio podcast