Question 1 Define the term reverberation? Question 2 What is a megaphone.Name the principle on which a megaphone work? Question 3 What is a stethoscope.Name the principle on which a stethoscope work? Question 4 What is a soundboard.Name the principle on which a soundboard work? Question 5 Why are the ceiling of concert halls made curved? Question 6 How can we … [Read more...] about Reverberation
Sound
Reflection of sound
Question 1 What is meant by reflection of sound? Question 2 What type of surfaces are best for reflecting sound? Question 3 State the laws of reflection? Question 4 Define the term echo? Question 5 Why an echo is heard sooner on a hot day? Reflection of Sound Sound can also be made to change its direction and bounce back when it falls on a hard surface. The … [Read more...] about Reflection of sound
Human ear
Question 1 Name that part of ear which vibrates when outside sound falls on it? Question 2 Name the tiny bones present in middle part of ear? Question 3 What is the function of tiny bones in the middle ear? Question 4 Name the tube which connects the middle ear to throat? Question 5 Explain the working of ear? Question 6 Name the nerve which carries electrical … [Read more...] about Human ear
Sound
Question 1 Define sound? Question 2 What type of wave are sound wave in air? Question 3 Name two types of sound waves which are generated in a long spring? Question 4 What are mechanical waves? Question 5 Explain the term compression? Question 6 Explain the term rarefaction? Sound Sound is a form of energy .It is that form of energy which makes us hear. … [Read more...] about Sound
sonar
Question 1 Write the full form of SONAR? Question 2 What is a SONAR? Question 3 What is the use of sonar? Question 4 A sonar picks up a return signal after 3 sec.How far away is the object? Question 5 What is eco-ranging? Question 6 What is echolocation? Question 7 How is the bat able to fly at night without colliding with objects? Question 17 Explain how … [Read more...] about sonar