Question

Question 2
A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case

(a) sound will be louder but pitch will not be different
(b) sound will be louder and pitch will also be higher
(c) sound will be louder but pitch will be lower
(d) both loudness and pitch will remain unaffected

Answer 1

(a) sound will be louder but pitch will not be different

Pitch is the property of the instrument, not how harder you press the key.