Question

The speeds of sound in four different media are given below. Which of the following is the most likely speed in m/s with which the two under water whales in a sea talk to each other when separated by a large distance ?
A. 340
B. 5170
C. 1280
D. 1530

Answer 1

The speed of water in sound is 1540(D)

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Answer 2

D. 1530 is the speed of sound in m/s between two under water whales in a sea talk.

Explanation:

• The speed of sound is distance travelled by sound per unit time.
• Sound always requires a medium to propagate from one place to another.
• It travels faster in elastic medium. The speed of the sound depends on the temperature and nature of the medium.
• In solids, the sound wave moves as shear waves. In fluids, the ratio of speed of object to speed of sound called mach number is used to calculate the speed.
• Speed of sound in distilled water is 1498 m/s and speed in salt water is 1531 m/s. The sea water is always salt water.