Question

question 9 of 28
what happens to the speed of a sound wave as it travels from air into glass?
water diamond glass air
speed of
sound
(m/s) 1,493 12,000 5,640 346
a. it decreases.
b. it falls to zero.
c. it stays the same.
d. it increases.

Explanation:

From the table, the speed of sound in air is \(346\ m/s\) and in glass is \(5640\ m/s\). Since \(5640>346\), when sound travels from air (lower speed) to glass (higher speed), its speed increases.

Answer:

D. It increases.