1 00:00:00,788 --> 00:00:02,187 Hello everyone! 2 00:00:02,187 --> 00:00:03,455 I am Yuhish Maharjan 3 00:00:03,455 --> 00:00:04,792 I am 14 years old 4 00:00:04,792 --> 00:00:05,988 I am from Nepal 5 00:00:05,988 --> 00:00:07,868 I live in Lalitpur, Nepal 6 00:00:07,868 --> 00:00:09,321 I am in grade 9 7 00:00:09,321 --> 00:00:13,021 My school's name is West Wing secondary school 8 00:00:13,257 --> 00:00:15,503 Today I am here to show you the experiment 9 00:00:15,503 --> 00:00:18,485 named underwater candle experiment 10 00:00:18,485 --> 00:00:21,872 In this experiment we can know how the 11 00:00:21,872 --> 00:00:24,384 candle burns inside the water and we can 12 00:00:24,384 --> 00:00:26,570 see the wick of the burning candle 13 00:00:28,101 --> 00:00:29,035 Hello everyone! 14 00:00:29,035 --> 00:00:31,036 Materials required for the experiment are 15 00:00:31,036 --> 00:00:32,316 Lighter 16 00:00:33,519 --> 00:00:35,816 Candle 17 00:00:36,665 --> 00:00:41,430 Measuring tape 18 00:00:41,824 --> 00:00:44,019 A glass of water 19 00:00:46,755 --> 00:00:49,183 Small pin 20 00:00:50,986 --> 00:00:52,886 Transparent bowl 21 00:00:58,590 --> 00:01:01,539 First, stick the candle into the bowl 22 00:01:01,722 --> 00:01:03,654 Do this by lighting the candle and 23 00:01:03,855 --> 00:01:06,406 allowing the candle to drip into the bowl 24 00:01:06,587 --> 00:01:09,686 Make sure that enough wax drip into the bowl 25 00:01:09,888 --> 00:01:11,353 to make the candle stick 26 00:01:15,037 --> 00:01:16,703 Once there is enough melted 27 00:01:16,836 --> 00:01:18,346 candle wax in the bowl 28 00:01:18,455 --> 00:01:20,381 stick the candle into it 29 00:01:23,079 --> 00:01:25,781 Wait to dry for about five minutes 30 00:01:28,163 --> 00:01:29,862 Next, pour water into the bowl 31 00:01:30,063 --> 00:01:32,079 until just the top of the candle 32 00:01:32,330 --> 00:01:34,229 You don't want the candle to be 33 00:01:34,380 --> 00:01:36,558 fully submerged in the water at this point 34 00:01:45,406 --> 00:01:47,838 After that, light the candle 35 00:01:48,138 --> 00:01:50,555 My lighter is not working so I will be 36 00:01:50,704 --> 00:01:52,704 using another candle to light this candle 37 00:02:01,390 --> 00:02:04,292 Now, slowly watch as the candle burns 38 00:02:04,830 --> 00:02:06,731 It will continue to burn even when the 39 00:02:06,914 --> 00:02:09,196 wick is below water level 40 00:02:17,226 --> 00:02:19,279 Sometimes, the candle dims and goes out 41 00:02:19,279 --> 00:02:21,245 just before the candle dies 42 00:02:21,245 --> 00:02:23,714 the water level rises almost 43 00:02:23,714 --> 00:02:26,145 one 10th of the pitcher 44 00:02:26,145 --> 00:02:28,278 No air bubbles have I seen 45 00:02:28,278 --> 00:02:30,212 The water level stays up for 46 00:02:30,212 --> 00:02:31,762 many few minutes more 47 00:02:32,006 --> 00:02:33,760 We measure how far the candle 48 00:02:33,760 --> 00:02:35,061 has burned down beneath 49 00:02:35,061 --> 00:02:36,277 the surface of the water 50 00:02:36,277 --> 00:02:38,609 Mine went down about 1,5 centimeters 51 00:02:38,817 --> 00:02:40,594 That's all, this was my experiment 52 00:02:43,834 --> 00:02:45,935 The conclusion of this experiment 53 00:02:45,935 --> 00:02:47,058 goes like this 54 00:02:47,074 --> 00:02:49,621 We can see that as the candle burns 55 00:02:49,819 --> 00:02:51,793 A part of the wax surrounding the wick 56 00:02:51,793 --> 00:02:52,772 does not melt 57 00:02:52,772 --> 00:02:55,418 leaving a well of protection around the wick 58 00:02:55,822 --> 00:02:58,438 This allows the candle to continue burning 59 00:02:58,438 --> 00:03:00,087 even though the flame is already 60 00:03:00,087 --> 00:03:01,671 lower than the water 61 00:03:01,937 --> 00:03:04,110 Basically, the cool water surrounding 62 00:03:04,110 --> 00:03:06,053 the candle is absorbing the heat 63 00:03:06,053 --> 00:03:07,020 from the flame 64 00:03:07,020 --> 00:03:09,270 This allows the wax to stay solid 65 00:03:09,270 --> 00:03:10,836 instead of melting and dripping 66 00:03:10,836 --> 00:03:13,019 on its sides like it normally does 67 00:03:13,019 --> 00:03:14,556 and that is how the candle can 68 00:03:14,556 --> 00:03:15,593 keep burning 69 00:03:15,593 --> 00:03:17,337 That is all for my experiment! 70 00:03:17,337 --> 00:03:18,284 Thank you!