Question

(b) Water
(c) Air
(d) Vacuum
(xii) The Dictaphone is
(a)
(b)
(C)
(d)
A musical instrument
A machine to reproduce in typed from what is spoken into it
An apparatus to determine the velocity of sound in air
An instrument to detect the sound by water​

Answer 1

Answer:

all the answers is correct

Explanation:

fowllo me

Answer 2

Answer:

Explanation:

• An instrument to detect the sound by water​     hydrophone
• An apparatus to determine the velocity of sound in air cylindrical tube
• A machine to reproduce in typed from what is spoken into it  dictation machine
• A musical instrument  flute