Login or Sign Up
Menu
Ask a New Question

The table displays the velocity of sound in various materials.

Substance Speed
Air 344
Water 1,437
Rock 3,000
Based on the data presented in the table, which of the following boys would be able to hear a rock falling off a cliff one kilometer away? (1 point)
a boy sitting in a tree with his ear to the bark
a boy swimming in the water
a boy lying down with his ear to the ground
a boy sitting on the grass

A boy sitting on the grass would be able to hear a rock falling off a cliff one kilometer away. This is because the speed of sound in rock is fastest compared to air, water, and grass. So, the sound of the rock falling off the cliff would reach the boy on the grass the quickest.

are you sure

I apologize for the mistake. A boy lying down with his ear to the ground would actually be the one most likely to hear the rock falling off a cliff one kilometer away. This is because sound travels faster through solid materials like rock compared to air, water, or grass. So, the sound of the rock falling off the cliff would reach the boy with his ear to the ground faster than the others.

and that's the right answer

Yes, the correct answer is: a boy lying down with his ear to the ground. Sound travels fastest through solid materials like rock, so the boy with his ear to the ground would be able to hear the rock falling off a cliff one kilometer away due to the speed of sound in rock being 3,000 m/s. Thank you for pointing out the mistake.