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gregori [183]
4 years ago
15

You drop a stone down a well that is 9.5 m deep. how long is it before you hear the splash? the 9) speed of sound in air is 343

m/s and air resistance is negligible.
Physics
2 answers:
sashaice [31]4 years ago
4 0

Answer:

We have the following data provided to us, as we have:

  • Depth of the well, s=9.5 m,
  • Acceleration,a due to gravity,g= 9.8 m/sec²,
  • speed of sound,v=343 m/sec.

Explanation:

  1. <u>First part of the problem:</u>

We have the following equations in order to solve the given problem:

s=(a×t²)/2,

Rearranging all the factors in the equations we get:

t=√(2×s/a),

so,

  • <u>t=0.4 sec, ⇒Answer no.01</u>

2. Sound.

  • s=9.5 meters,
  • V=343 m/sec²,
  • t₂=?,
  • V=s/t,
  • s=V×t,
  • t=s/V,
  • t=9.5/343,
  • <u>t=0.027 seconds.⇒Answer no.2</u>

-------------------------------------------------

V1+V2=1,38s+0,03s=1,41s

Stells [14]4 years ago
3 0
1. stone

s=9,5m
a=g≈10m/s²

t1=?

s=(at²)/2
2s=at²
2s/a=t²
t=√(2s/a)=√(2*9.5m/10m/s²)=√(1,9s²)≈1,38s

2. sound

s=9,5m
V=343m/s²

t2=?

V=s/t
Vt=s
t=s/V=9,5m/343m/s≈0,03s


-------------------------------------------------

V1+V2=1,38s+0,03s=1,41s




"Non nobis Domine, non nobis, sed Nomini tuo da gloriam."




Regards M.Y.
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