Answer:
The sound travels at 
Option: c
Explanation:
Unknown source plays of middle C (fs) = 262 Hz
The sound wave from this source have to travel to raise the pitch to C sharp is (fd) = 272 Hz






Substitute the given values in the formula,




Therefore, The sound travels at 
<u>Force</u>, it can speed up or slow down an object which can change the direction in which an object is moving.
Answer:
The correct answer is "
".
Explanation:
According to the question,
The work will be:
⇒ 




Thus the above is the correct answer.
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