Class 8 science chapter 13 Sound Notes

array(10) { [0]=> object(stdClass)#4149 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "HewEglHS4I0" ["related_video_title"]=> string(100) "Sound Class 8 NCERT Solution | NCERT Class 8 Science Chapter 13 Exercise Solutions |Sound Q/A Solved" ["posted_time"]=> string(19) "1 год назад" ["channelName"]=> string(13) "Prep Yourself" } [1]=> object(stdClass)#4122 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "4sWwW9j4bfc" ["related_video_title"]=> string(78) "CBSE Class 8 || Science || Sound || Animation || in English @digitalguruji3147" ["posted_time"]=> string(27) "9 месяцев назад" ["channelName"]=> string(14) "Digital Guruji" } [2]=> object(stdClass)#4147 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "dS5zs95V8lQ" ["related_video_title"]=> string(97) "Science Class 8 Chapter 14 Chemical Effects Of Electric Current Notes #studygyan #study #science" ["posted_time"]=> string(27) "7 месяцев назад" ["channelName"]=> string(11) "Study Gyan " } [3]=> object(stdClass)#4154 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "mmMYd2oqGFY" ["related_video_title"]=> string(25) "Sound | Physics | Class 8" ["posted_time"]=> string(19) "5 лет назад" ["channelName"]=> string(6) "Aasoka" } [4]=> object(stdClass)#4133 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "aFsZHrc0N1c" ["related_video_title"]=> string(76) "Combustion and Flame | Full Chapter Revision under 30 mins | Class 8 Science" ["posted_time"]=> string(19) "1 год назад" ["channelName"]=> string(23) "BYJU'S - Class 6, 7 & 8" } [5]=> object(stdClass)#4151 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "LjOewfgdM18" ["related_video_title"]=> string(171) "ВОССТАНОВЛЕНИЕ НЕРВНОЙ СИСТЕМЫ 🌸 Нежная музыка, успокаивает нервную систему и радует душу #6" ["posted_time"]=> string(27) "5 месяцев назад" ["channelName"]=> string(15) "Relax Your Soul" } [6]=> object(stdClass)#4146 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "XlUZ-6EvsXM" ["related_video_title"]=> string(139) "СЛОМАННЫЕ СЕРДЦА ( 2025 ) - НОВАЯ МЕЛОДРАМА 2025 ГОДА - РУССКАЯ МЕЛОДРАМА - НОВИНКА" ["posted_time"]=> string(19) "2 дня назад" ["channelName"]=> string(11) "Megan Slime" } [7]=> object(stdClass)#4156 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "OTsvUXpuYOs" ["related_video_title"]=> string(93) "Sound - Full Chapter Explanation & NCERT Solutions | Class 8 Science Chapter 13 (2022-23)" ["posted_time"]=> string(21) "2 года назад" ["channelName"]=> string(13) "Magnet Brains" } [8]=> object(stdClass)#4132 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "weVV6ePt6iY" ["related_video_title"]=> string(45) "Все глюки тела за 12 минут" ["posted_time"]=> string(20) "21 час назад" ["channelName"]=> string(37) "Объяснить за 5 минут " } [9]=> object(stdClass)#4150 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "X5iUWGipy2s" ["related_video_title"]=> string(37) "Sound | Part 1/2 | English | Class 8" ["posted_time"]=> string(21) "4 года назад" ["channelName"]=> string(19) "TicTacLearn English" } }