air = 344 (speed (meters per second)
water = 1,437(speed (meters per second)
rock = 3,000 (speed (meters per second)
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)
Responses
A. a boy swimming in the water
B. a boy sitting on the grass
C. a boy sitting in a tree with his ear to the bark
D. a boy lying down with his ear to the ground
D. a boy lying down with his ear to the ground
Since the speed of sound in rock is 3,000 meters per second, a boy lying down with his ear to the ground would be able to hear a rock falling off a cliff one kilometer away.