Lakhmir Singh & Manjit Kaur Solutions for Chapter: Sound, Exercise 3: EXERCISES

Author:Lakhmir Singh & Manjit Kaur

Lakhmir Singh & Manjit Kaur Physics Solutions for Exercise - Lakhmir Singh & Manjit Kaur Solutions for Chapter: Sound, Exercise 3: EXERCISES

Attempt the free practice questions on Chapter 6: Sound, Exercise 3: EXERCISES with hints and solutions to strengthen your understanding. Lakhmir Singh's Science Physics solutions are prepared by Experienced Embibe Experts.

Questions from Lakhmir Singh & Manjit Kaur Solutions for Chapter: Sound, Exercise 3: EXERCISES with Hints & Solutions

MEDIUM
7th ICSE
IMPORTANT

A ship sends out a sound signal straight down and receives its echo after one second. What is the depth of the sea at this spot? (Speed of sound in water =1430 m/s).

MEDIUM
7th ICSE
IMPORTANT

Pendulum A makes 15 oscillations in 5 s and pendulum B makes 8 oscillations in 4 s. Which has higher frequency? Express the frequency of each pendulum in hertz.

EASY
7th ICSE
IMPORTANT

The frequency of a vibration is the inverse of its time period. What is the time period of a pendulum which is vibrating with a frequency of 10 Hz?

MEDIUM
7th ICSE
IMPORTANT

The speed of sound in water is 1500 m/s. How far away from an under-sea rock should a deep sea diver be, so that he can hear his own echo ? The diver hears echo in 3 s.

MEDIUM
7th ICSE
IMPORTANT

The deepest part of oceans in the world is the Marians Trench in the pacific ocean which is 11,033 m deep. If you were on a ship above this trench and send a sound signal straight down to the water, how long will it take for the echo to reach you? (speed of sound in water is 1500 m/s)

MEDIUM
7th ICSE
IMPORTANT

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A trumpeter and a clarinetist are standing well apart and playing a tune in unison(the same note together). A microphone is placed in a hall at the same distance from both of them as shown in the figure. If the trumpeter is playing louder than the clarinetist, the correct statement is:

 

MEDIUM
7th ICSE
IMPORTANT

The graph below shows the displacement versus time relation for a sound wave travelling with velocity of 1000 ms-1. What is the wavelength of the wave?

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MEDIUM
7th ICSE
IMPORTANT

What does this picture show?

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