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

Academic Physics NCERT Class 9

As whales in a sea talk to each other inside water. So, should be equal to the speed of sound in water and that is $1530\ m/s$.

So, option (d) is correct.

Updated on: 10-Oct-2022

26 Views

Related Articles
Which of the following is not likely to cause tsunami?$(a)$. A major nuclear explosion under sea$(b)$. Earthquake$(c)$. Volcanic eruption$(d)$. Lightning
Refractive indices of four media A, B, C and D are given below:MediumRefractive IndexA1.33B1.44C1.52D1.65In which of these four media is the speed of light (i) maximum, and (ii) minimum?
Which of the following could not be a unit of speed(a) $km/h$(b) $s/m$(c) $m/s$(d) $mms^{-1}$
Sound produced by a thunderstorm is heard $10\ s$ after the lightning is seen. Calculate the approximate distance of the thunder cloud. $(Given\ speed\ of\ sound=340\ ms^{-1})$.
The frequencies of four sound waves are given below. Which of these sound waves can be used to measure the depth of sea by the echo method?(a) 15,000 Hz (b) 10 kHz(c) 50 kHz(d) 10,000 Hz
Which of the following place is most likely to be affected by a cyclone?$(a)$. Mumbai$(b)$. Puri$(c)$. Goa$(d)$. Porbandar
The maximum speed of vibrations which produce audible sound will be in:(a) dry air(b) sea water(c) ground glass(d) human blood
What name is given to those aircrafts which fly at speeds greater than the speed of sound?
Under which of the following conditions are you most likely to fall sick?(a) when you are taking examinations (b) when you have travelled by bus and train for two days(c) when your friend is suffering from measles. Why?
What is the speed of sound:(a) in air? (b) in water? (c) in iron?
Which of the following is most likely to have a much higher breathing rate?(a) man (b) fish (c) dog (d) sparrow\n32284"
Fill in the following blanks with suitable words:(a) Sound is caused by .................(b) A sound wave consists of places of higher pressure called ................. and places of................pressure called.................(c) Wave speed in metres per second equals frequency in ............ multiplied by ..................... in ...................(d) Sound cannot travel through ................(e) The speed of sound in a solid is ............... than the speed of sound in air.(f) When the frequency of the sound is increased, the wavelength.................
A bus travels 54 km in 90 minutes. The speed of the bus is$(a)$. 0.6 m/s$(b)$. 10 m/s$(c)$. 5.4 m/s$(d)$. 3.6 m/s
The physical quantity which makes it easier to accelerate a small car than a large car is measured in the unit of:$(a).\ m/s$$(b).\ kg$$(c).\ kg.m/s$$(d).\ kg.m/s^2$
The echo of a sound is heard after 5 seconds. If the speed of sound in air be 342 m/s, calculate the distance of the reflecting surface.

Kickstart Your Career

Get certified by completing the course

Advertisements