A bat flying in a cave emits a sound and receives its echo 0.1 s later. Show that its distance from the cave wall is 19 m

Question

mrnood · Answer

The sound travels from the bat AND back from the wall

The speed of sound is taken to be approx. 340m/s

So in 0.1s sound travels 34m - which means the bat is 17m from the wall - so I disagree with the given answer.


IF the bat was flying at 20m/s then it would have travels 2m in the time the echo comes back - so it IS possible that it was 19 m away, flying towards the wall - but that informationis not given in the question.

I think the given answer is incorrect.

anonymous · Answer

Okay I was wondering why I kept keeping 17m

anonymous · Answer

4. in  colombian high schools , students have to choose the track they want to be in because each track leads to specific kind of  ____ . ( 1point  ) 

A. school

b. diploma 

c. instructors 

d. Escuela Nueva

mrnood · Answer

please start a new thread in the appropriate forum - this is Physics