Question

What about the speed of sound in water?

Answer 1

Hint: Fortnight is 14 days. The term itself originates from fourteen + nights. Hence, the period of 14 nights is considered as a fortnight. Examples of a fortnight, when used in a sentence, are as follows: I need your bike for a fortnight; we spent a fortnight in search of a home.

Complete step-by-step solution:
The speed of sound is dependent on the pressure as well as temperature. In water, the speed of sound is also dependent on the salinity of the water. The speed of sound in freshwater is lower than the speed of sound in seawater. Sound waves travel slowly in the air, faster in water, and even faster in solids.
For water,
The speed of sound in water is approximately \[1480m/s\] at room temperature \[\left( {20 - {{25}^0}C} \right)\].
For air,
The speed of sound in the air is approximately \[331m/s\] at \[{0^0}C\] temperature.

Note:The question can be given in the other way also. 1) Sound waves can travel faster in water than in air. True or false? Here, the answer is true. 2) Sound waves travel faster in air and slower in water. True or False? Here, the answer is false whereas the answer to the first question is true. Students read the question properly before answering such types of questions. They need not hurry.