|
A simple pendulum performs 18 oscillations per second. The mechanical wave produced by it will be |
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|
(a) |
sound wave |
(b) |
ultrasonic wave |
|
(c) |
subsonic wave |
(d) |
electromagnetic wave |
|
A simple pendulum performs 18 oscillations per second. The mechanical wave produced by it will be |
|||
|
(a) |
sound wave |
(b) |
ultrasonic wave |
|
(c) |
subsonic wave |
(d) |
electromagnetic wave |