A loud alarm attached to a metal fence begins to ring. Student X has her ear against a pole of the fence while student Y stands away from the fence, as shown below. Both students are the same distance from the alarm.
Which of the following statements explains what happens in this situation?

a. Student X hears the alarm first because sound travels faster in solids than in gases.

b. Student Y hears the alarm first because sound travels faster in gases than in solids.

c. Student X hears the alarm at a higher pitch because solids are denser than gases.

d. Student Y hears the alarm at a higher pitch because gases are denser than solids.

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.