Absorption of ingested water and most solutes occurs in the proximal small intestine, therefore the rate at which beverages are emptied from the stomach is an important factor in determining the rate of water absorption.
Where is cohesion used?
Cohesion holds the water molecules together, while adhesion helps the water molecules stick to glass or plant tissue. The smaller the diameter of the tube, the higher water can travel up it. Cohesion and adhesion are also responsible for the meniscus of liquids in glasses.
Which attribute of water allows some insects to walk on the surface of a pond?
Terms in this set (5) Name the property of water that allows insects to walk across the surface of a pond. The high surface tension is what allows an insect to “walk on water”. The insect can walk on the surface as long as it does not exert enough for the break the hydrogen bonds between the water molecules.
Which force is stronger cohesion or adhesion?
Since water forms a concave up meniscus, the adhesion of the molecules to the glass is stronger than the cohesion among the molecules. However, in the absence of the adhesive force (when water reaches the tip of the glass), the cohesive force remains present.
Which of the following is the tendency of a water molecule to stick to other water molecules?
The tendency for water molecules to stick or cling to another surface is called adhesion.
Which property of water would explain how insects walk on the water?
Answer 1: The weight of the insect and structure of their feet in combination with the surface tension of water allow some insects to walk on water. Water molecules are more attracted to each other than they are to other materials, so they generate a force to stay together called surface tension.
Why are lipids hydrophobic?
Lipids are a large and diverse class of biological molecules marked by their being hydrophobic, or unable to dissolve in water. The hydrophobic nature of lipids stems from the many nonpolar covalent bonds. Water, on the other hand, has polar covalent bonds and mixes well only with other polar or charged compounds.
Why can insects walk on walls?
The pads typically contain numerous hairs that secrete an oily substance that causes the tips of the hairs to adhere to the surface. This substance provides the traction and stickiness that allows insects to hold on to smooth surfaces, such as glass.
Why can insects walk upside down?
Scientists have learned that the tiny hairs attached to fly feet produce a glue-like substance that helps the wall-climbing insects walk upside-down.
Why can spiders walk on water?
Walking on water Fishing spiders are able to walk on water because of something called surface tension. It’s science! Water molecules are attracted to each other. This bond is stronger at the surface, where water meets the air, which helps hold this crafty spider above the water’s surface.
Why can spiders walk upside down?
Spiders can walk upside-down across almost any type of surface because they exploit electrostatic, van der Waals forces, according to a team of German and Swiss scientists.
Why can water travel up a tree?
Water mostly enters a tree through the roots by osmosis and any dissolved mineral nutrients will travel with it upward through the inner bark’s xylem (using capillary action) and into the leaves.
Why cohesion and coherence is important?
Cohesion and coherence are important aspects of the structure of academic writing as they have an influence on the readability and logical flow of the argument of a text.
Why do animals float on water?
Objects either float or sink in water because of something called buoyancy. When an object placed in water weighs less than the amount of water it displaces, it floats.
Why do boats float in water?
If the downward gravitational force is less than the upward buoyancy force then the object floats, otherwise it sinks. That is, if an object weighs less than the amount of water it displaces then it floats otherwise it sinks. A boat floats because it displaces water that weighs more than its own weight.
Why do flies crawl on the floor?
Why are Flies in my House? Flies are just trying to survive and, inside your house, flies will land on your food, soda, dog food and many other things to get a tasty meal. Anything sweet will definitely attract flies.
Why do ice floats on water?
Believe it or not, ice is actually about 9% less dense than water. Since the water is heavier, it displaces the lighter ice, causing the ice to float to the top.
Why do insects are able to work upside-down on ceiling or on wall without falling?
Certain insects have specialized feet that enable them to defy gravity and walk in places that seem to be impossible to cling to. Stiff hairs, natural adhesives and large claws all come into play to enable the insect to walk on smooth, upright or upside-down surfaces.
Why do plants need cohesion and adhesion?
Cohesive and adhesive forces are important for the transport of water from the roots to the leaves in plants. … This pull results from the tendency of water molecules being evaporated on the surface of the plant to stay connected to water molecules below them, and so they are pulled along.