<em>A megaphone used by a cheerleader can allow people on the opposite side of a field to hear her better because;</em>
D. Solid objects can change the direction of sound waves; megaphones allow users to determine the general direction of the sound.
<u>Determination of the general direction of the sound lessens its dispersion and thus, it reaches the observers at a higher intensity, hence it being louder.</u>
Answer:
Tsunami is a large water wave that is generated by underwater earthquakes
They have unique no. of protons in its nucleus
Answer:
The vertical colloumns in the periodic table, they're called groups/families because of similar chemical behavior
Answer: B. in living cells.
Explanation:
A virus is an infectious agent. It is parasitic in nature. It is of small size and of simple composition. It requires a living host to grow and reproduce.
It transfers it's genetic materials into the host cell machinery. In the host cell the virus utilizes the host cell machinery to replicate it's own DNA or RNA.
