Which of the following energy sources is expected to have the least growth in the next 20 years? a. hydroelectricity b. coal c. natural gas d. nonhydro renewables select the best answer from the choices provided

coal

Explanation:

As coal is used in a huge amount in the present world

mostly in developing country

it is expected to be extinct or finished soon from the earth

so it need to be used wisely

the index of refraction of the second medium is higher. i just took the test trust me !

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.