Once this initial energy is added, the wave travels through the medium until all its energy is transferred. In contrast, electromagnetic waves require no medium, but can still travel through one.
<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>
The nurse should explain to the parent that the sweat test is performed in order to measure the concentration of salt in the child's sweat. Cystic fibrosis is an autosomal recessive disorder which involves the secretion of fluids in specifics exocrine glands.
Answer:
True
Explanation:
Communities can include different species also.
The Metamorphic Rock must undergo a process called Weathering and Erosion. Once it has become sediments it goes under another process called Cementing and Compacting. Now it has become a sedimentary rock.
