what are clouds made of with narration - geography for kids educational videos by mocomi
Bookmarked 391 weeks ago
http:mocomicom presents: what are clouds made of with narrationone of the most common sights in nature are clouds- white and fluffy gray and overcast or the brilliant colours they turn into at sunset in terms of weather they are simply visible masses of tiny water droplets and a whole branch of study called cloud physics is dedicated to understanding this cotton candy-looking phenomenonwhen the sun shines over rivers lakes and oceans of the world it heats up the surface of the water the water turns into gaseous water vapour on being heated and begins to rise into the air as it goes higher the water vapour begins to cool down and turns back into water droplets the temperature at which water condenses is called the dew point the dew point is not a constant because it depends on the amount of water present in the airthese water droplets in clouds are so tiny that they hang suspended high up in the earth039s atmosphere over a period of time condensed water vapour accumulates to

magnetic liquid - ferrofluid - dancing ferrofluid
Bookmarked 749 weeks ago
a magnetic liquid or ferrofluid is a colloidal mixture of magnetic particles 10 nm in diameter in a liquid carrier ferrofluids can be suspended in water or in an organic fluid when no external magnetic field is present the fluid is not magnetic and the orientation of the magnetite particles is random however when an external magnetic field is applied the magnetic moments of the particles align with the magnetic field lines when the magnetic field is removed the particles return to random alignment these properties can be used to make a liquid that changes its density depending on the strength of the magnetic field and that can form fantastic shapes wwwispurunode5796