These intermolecular forces, known as van der Waals forces, can negate the tendency of those molecules to evaporate
, even at elevated temperatures.
How do you think water evaporates
? (The sun's rays cause surface temperatures to rise.
Their concept is inspired by plants, which use tiny pore openings--stomata--to evaporate
water, generating a capillary force for cooling the leaf surface and distributing nutrients.
Since the cooling takes place as the water evaporates
from the sand, the drier the air flow, the more efficient the cooling.
Labour will just have to sit it out and hope public support will evaporate
(The level will not be announced until mid-1999.) In any event, the costs will be borne mainly by smaller communities: Gas evaporates
more slowly from wells than from rivers or reservoirs, and the high fixed cost of filtration makes water treatment an expensive process for utilities that serve a small number of customers.
Cook uncovered, stirring often, until liquid evaporates
and vegetables begin to brown.
For example in the mechanical evaporator, we have to burn a lot of firewood and evaporate
the water physically, whereas in here, we do not evaporate
the water by any external forces," said Raja Shanmugam, Chairman NIFT-TEA.
As the water in sweat evaporates
, it helps wick heat away from the human body.
For instance, Sussman explains mow heat energy from the sun is converted into the moving energy of the wind, how it evaporates
water to power the water cycle, and how it's trapped on Earth by the greenhouse effect.
Regular use helps prevent bacterial transfer and reduces hospital-acquired infections, It evaporates
instantly and leaves no sticky residue, leaving hands sanitized, smooth, refreshed, and conditioned.
* some of the Mg in the molten iron evaporates
and forms a partial pressure with the N atmosphere above the melt.