anonymous
  • anonymous
hey all, i need to know how a sponge works. Or a candle wick, or even a tree-root for that matter. What causes liquid to be absorbed ( against gravity ) into a substance (like a sponge, etc..) . What energy or process causes this to happen?
Physics
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chestercat
  • chestercat
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anonymous
  • anonymous
simply it is the capillary rise and surface tension which does the job. Sponge has got tiny pores through which water seeps in by capillary rise........
anonymous
  • anonymous
there are some other cohesive forces which are acting within the liquids (surface tension for instance). This helps them to defy gravity at times...
matthewrlee
  • matthewrlee
They have holes. Stuff fits into the holes until the holes are full.

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anonymous
  • anonymous
forces acting against gravity include capilary rise(due to surface tension), osmotic pressure since the concentration of water is more in the soil compared to the cell of roots.

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