Yeah it seems like A is the right answer to me
Answer:
A good summary of an essay should probably include the main idea of each paragraph, and the main evidence supporting that idea unless it is not relevant to the article or essay as a whole. A summary does not need a conclusion, but if the original ends with a message to the reader this should not be left out.
Answer:
thank you for the free points
Explanation:
pick me as the brainliest
Answer:
Explanation:
Sounds have basically two characteristics: pitch and loudness. The pitch is the ear's method of informally measuring how close together waves peaks and valleys are. The closer they are, the higher the pitch.
What this write up says about loudness is really amplitude. Amplitude is the height of the peaks from the neutral position. So just by varying the height of the waves and the closeness they are to each other determines the multitudes of the various sounds that we hear -- from very loud or very soft and from very high pitched to a very low rumble.
There is another property that's extremely important and that is what is carrying the sound. The speed that sound travels is determined by what is carrying the waves. If sound is carried by a steel pipe, the sound moves much faster through the pipe than it would if it is carried through air. Movies make quite a todo about people putting their heads to the tracks to see if they hear a train going somewhere on the tracks. It's really just the fact that sound travels through solids better than through air and they can hear the train long before they can see it.
