1 00:00:10,520 --> 00:00:14,250 It's March thirty-first this is day 2 00:00:15,810 --> 00:00:21,070 Fifteen, sixteen or seventeen now I've lost track of where we are. At any event, 3 00:00:21,070 --> 00:00:23,450 student last class 4 00:00:25,260 --> 00:00:29,430 Investigated the claims and efficacies of 5 00:00:29,430 --> 00:00:33,570 a commercial product called the thawmatic or the magic thaw which are claimed to 6 00:00:34,800 --> 00:00:36,720 Defrost meats very efficiently. 7 00:00:38,350 --> 00:00:38,960 So. 8 00:00:40,230 --> 00:00:42,940 Each of the groups came up with 9 00:00:42,940 --> 00:00:46,070 their own ideas of what aspects of that they wanted to test. 10 00:00:48,030 --> 00:00:51,490 Everyone pretty quickly came to the conclusion that in fact it does work, it 11 00:00:51,490 --> 00:00:56,280 thaws water, it thaws ice very efficiently and then they were tasked with 12 00:00:56,280 --> 00:01:00,700 trying to come up with exactly how it works and how the principles of heat movement are 13 00:01:01,880 --> 00:01:06,340 Engaged with that or whether the products in fact are magic as they seem to claim. 14 00:01:08,060 --> 00:01:12,270 So the students today are going to have the opportunity to at the beginning the class to 15 00:01:12,270 --> 00:01:17,710 integrate their results to point out their critical experiments, put a poster together 16 00:01:17,710 --> 00:01:21,890 that summarizes their work because each group is doing something very different 17 00:01:21,890 --> 00:01:22,790 from the other groups. 18 00:01:24,830 --> 00:01:28,630 So giving fifteen or twenty minutes to do that then most of the rest of 19 00:01:28,630 --> 00:01:32,990 the period will be the groups reporting out, while their reporting out I'm going to 20 00:01:32,990 --> 00:01:37,870 try to keep a set of notes on the board that summarizes what has been learned from 21 00:01:37,870 --> 00:01:41,330 those experiments so we'll have a collective set of notes that we can work 22 00:01:41,330 --> 00:01:46,020 a discussion from rather than have a bunch of individuals collecting notes and 23 00:01:46,020 --> 00:01:47,790 then try to have a discussion from that. 24 00:01:49,410 --> 00:01:52,200 And so we might have about thirty minutes at the end, twenty or 25 00:01:52,200 --> 00:01:57,020 thirty minutes to really talk through those things and see if we can come up with 26 00:01:57,020 --> 00:02:03,050 a, a consensus idea as to how the products work and 27 00:02:05,610 --> 00:02:10,700 First of all how it is that they thaw meat and how it is that heat is involved 28 00:02:10,700 --> 00:02:14,700 in that process using the fundamental ideas that we've been talking about 29 00:02:14,700 --> 00:02:17,180 of radiation, convection, and conduction. 30 00:02:20,510 --> 00:02:25,140 I will send them away today with some readings that further 31 00:02:25,140 --> 00:02:30,190 show applicable application areas of those ideas and 32 00:02:31,200 --> 00:02:35,040 the timing works out very well on that, I'm going to set up a jigsaw structure for 33 00:02:35,040 --> 00:02:37,810 that, I'm going to ask everybody to read everything but 34 00:02:37,810 --> 00:02:43,150 I'm going to ask a particular people to pay attention to particular 35 00:02:43,150 --> 00:02:48,040 sets of those readings specifically so that they have a stronger expertise with those. 36 00:02:49,310 --> 00:02:53,580 So it'll be a fun day, students are going to be moving around reporting out it's 37 00:02:53,580 --> 00:02:56,720 always interesting to see how they interpret things and 38 00:02:56,720 --> 00:03:01,180 we'll see if we can use their observations and inferences to pulled together 39 00:03:01,180 --> 00:03:03,920 the big ideas for how these particular products work.