if we press the keys of a harmonium one after another, different sounds are heard. Why?
Each key produces a sound of different frequency. You perceive different sounds as being higher or lower in pitch due to that.
(a) Why a sound cannot be heard on the moon
(b) How do astronauts talk to one another on the surface of moon and why ?
Explain why, if we strike a table lightly, we hear a soft sound but if we hit the table hard, a loud sound is heard.
Question 101 (i)
Here is a keyboard for a harmonium. Find the ratio of white key to black keys on the keyboard.