2. Электричество. Тепловое действие электрического тока.
Популярная лекция о тепловом воздействии электрического тока.
1 week ago 00:07:04 1
2 weeks ago 00:14:10 1
4 weeks ago 00:06:22 1
2 months ago 00:01:40 1
2 months ago 00:09:46 9
2 months ago 00:38:11 1
2 months ago 09:30:22 1
2 months ago 03:49:52 1
2 months ago 00:02:36 1
2 months ago 00:29:56 1
2 months ago 00:11:11 1
2 months ago 00:28:34 1
2 months ago 00:18:51 1
2 months ago 00:14:12 1
2 months ago 00:00:00 1
2 months ago 00:14:25 1
2 months ago 00:19:42 1
2 months ago 02:49:56 1
2 months ago 00:00:48 1
2 months ago 00:02:19 1
2 months ago 00:00:00 3
2 months ago 00:11:28 1
2 months ago 00:02:28 1
2 months ago 00:03:26 1
