Question 1 What is noise? Question 2 Give examples of noise? Question 3 What is musical sound? Question 4 How is noise produced? Question 5 How is musical sound produced? Noise The unpleasant sounds around us are called noise. Noise is produced by the irregular vibrations of the sound producing source. For Example: Running of mixer and grinder in the … [Read more...] about Noise and Music
Class 8
Audible and Inaudible Sound
Question 1 Why we do not hear the screams of a bat? Question 2 What is the name of very high frequency sound which cannot be heard by human ears? Question 3 What is an audible sound? Question 4 What is an inaudible sound? Question 5 State few uses of ultrasound? Question 6 What is ultrasound? Question 7 What is the upper limit of frequency of human hearing … [Read more...] about Audible and Inaudible Sound
Characteristics of Sound
Question 1 How does the loudness depends on the amplitude of vibration? Question 2 By how much the loudness of sound changes when the amplitude of vibrations is doubled and halved? Question 3 Name the unit to measure the loudness of sound? Question 4 What is the loudness of normal conservation in decibels? Question 5 On what factors does the pitch of a sound … [Read more...] about Characteristics of Sound
Amplitude, Time-Period and Frequency of Vibration
Question 1 Define the term vibration? Question 2 How is simple pendulum made? Question 3 What is the relation between time period and frequency of an oscillating body? Question 4 Name 3 characteristics which are used to describe oscillations? Question 5 Define the term amplitude? Question 6 How can we increase the amplitude of vibration? Question 7 How can we … [Read more...] about Amplitude, Time-Period and Frequency of Vibration
Ears
Question 1 Draw a neat and labelled diagram of human ear? Question 2 Explain the working of human ear? Question 3 Name the organ of hearing in human being? Question 4 Name that part of ear which vibrates when outside sound falls on it? Question 5 Name the three tiny bones present in the middle part of ear? Question 6 What is the function of three tiny bones in … [Read more...] about Ears