KERALA PSC LDC 2020 Physics || Sound || Sruthy's learning square||SCERT||NCERT
Sruthy's Learning square
0:00 / 0:00
KERALA PSC LDC 2020 Physics || Sound || Sruthy's learning square||SCERT||NCERT
6 972 просмотра · 6 лет назад
Sruthy's Learning square
176 тыс. подписчиков
6 972 просмотра · 6 лет назад
megaphone is a device to amplify a person's voice or other sounds (usually portable)
