is locked away at the centre and no matter what direction you approach the molecule from you see a \(\delta-\) charge. This means that the molecule itself is non-polar due to symmetry.
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But have you ever wondered what plants and animals live in a polar habitatand how they survive in the cold? Well, wrap up warm, we're off to the Arctic Circle to find out! Brrr… It looks really ...
As a result, the northern polar seasonal cap contains a higher concentration of dust than the south polar cap, making the ice less robust. "They're not symmetric seasons," Hansen said. Differences ...
Polar bears are the planet’s biggest land-based carnivores – although they actually spend most of their lives around water and ice (their Latin name means ‘sea bear’). So they’re at particular risk ...
Condron, Alan Bigg, Grant R. and Renfrew, Ian A. 2006. Polar Mesoscale Cyclones in the Northeast Atlantic: Comparing Climatologies from ERA-40 and Satellite Imagery. Monthly Weather Review, Vol. 134, ...
Polar bear safaris serve up a rare opportunity to meet Arctic man-eaters under the northern lights. Colby J Brokvist Polar bears are the only mammal known to actively hunt humans. Still, every ...
PBS3 个月
Polar Lab
Something big is happening to Earth’s climate, and the polar regions hold the key to understanding it. Join top scientists on the hunt for clues that tell a surprising story about our planet’s ...
The great white polar bear is the youngest and largest of the world's bear species — a mighty hunter and fierce defender of its young that's among the world's most vulnerable animals. Two-thirds of ...
As the climate warms, polar bears are seen on land earlier in the season At the end of the Canadian Arctic summer, polar bears head inland to wait for the ice to form. And while thousands of ...