physics

A physics student drops a physics text book into a mine shaft 250m deep,where the average mine temperature is 5degrees celsius.Show that the sound of the book striking the bottom is heard after 7.82seconds

asked by musuma
  1. d = Vo*t + 4.9*t^2 = 250 m.
    0 + 4.9t^2 = 250.
    t^2 = 250 / 4.9 = 51.0.
    Tf = 7.14 s. = Fall time.

    d = V*T.
    T = d/V = 250m / 343m/s = 0.729 s. =
    Time for sound to travel 250 meters up.

    Tf + T = 7.14 + 0.729 = 7.87 s.

    posted by Henry

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A physics student drops a book into a shaft 250m deep,where the average mine temperature is 5 degrees celsius.Show that the sound of the book striking the bottom is heard after 7.82 seconds
  2. science

    A girl drops a stone into a mine shaft 122.5m deep. How soon after she drops it does she here the sound of it striking the bottom of the shaft?
  3. Physics

    You are hiking out in California and come across an abandoned mine shaft. Wondering how deep the mine shaft is you toss a rock in and it takes 5.1 seconds before hitting the bottom. How deep is the mine shaft in meters?
  4. physics

    a stone is dropped from rest at the top of a mine shaft. it takes 59 s for a stone to fall to the bottom of a mine shaft. how deep is the shaft? the acceleration of gravity is 9.8 m/s2
  5. physics

    A stone is dropped from rest at the top of a mine shaft. It takes 58 s for a stone to fall to the bottom of a mine shaft. How deep is the shaft? The acceleration of gravity is 9.8 m/s2 .
  6. Physics

    A mine shaft is known to be 57.8 m deep. If you would drop a rock down the shaft, how long would it take for you to hear the sound of the rock hitting the bottom of the shaft knowing that sound travels at a constant velocity of
  7. Physics

    A mine shaft is known to be 57.8 m deep. If you would drop a rock down the shaft, how long would it take for you to hear the sound of the rock hitting the bottom of the shaft knowing that sound travels at a constant velocity of
  8. physics

    Carol drops a stone into a mine shaft 122.6 m deep. How soon after she drops the stone does she hear it hit the bottom of the shaft?
  9. Physics

    Carol drops a stone into a mine shaft 12.6 m deep. How soon after she drops the stone does she hear it hit the bottom of the shaft?
  10. physics

    It takes 5 seconds for a stone to fall to the bottom of a mine shaft. How deep is the shaft?

More Similar Questions