hi I'm Diana you're watching physics girl and welcome to the last part of physics riddles with my friends the queen of imperfect robots to vote yet if you haven't seen the last part I've got a link in the description in the card and you know all the good stuff here's a recap of the second riddle and the end all right you're sitting in a boat holding a rock and it's a rock that will sink in the water you throw it off of the boat into the water and it sink does the water level go up go down or stay the same so I think that when you have it in the boat it's the weight of the rock that matters because that's like what's weighing the boat down and pressing the water out displacing someone yeah displaces the water but when you throw it off it's the volume of the rock that matters because so now the volume is displacing the water yes I mean if it's one of those you know those rocks that float like pink steel and sweet head but I did say that it okay I'll check it okay so yeah I see what you're getting at but part of the important that set up of the question is that the rocks sink mm-hmm the weight of the stone is going to displace more watery than the volume of it and that is because that's because it's that it's more done through the water I like how you're thinking ya know so I think that the water level is gonna thing because if you just have a barrel of water or a mass of water you would happen in the boat and then you throw it on the side that wouldn't affect it because that same volume of water weighs as much as soon as you value yeah but the differences of the Rockets heavier is just more dense than water yes they're correct yeah yeah that was exactly correct reasoning thank you I actually made a video about this one in the way that I like to remember it is I think is like a really extreme case so if you have like a super super super heavy rock but it's really small yeah we imagine a rock made out of like black hole material if you put that in your boat your boat is going to it's going to sink really far down into the water and that will push the water level up really far and then when you throw it overboard the boat will come way far back up and the water level will go down because it won't displacement water once it falls in the water I think we're all that's such a good approach to problem-solving or just taking it to one of the extremes I mean like this this reasoning make sense yeah extreme cases now second question no there's more there's more what is the difference between a servomotor and a DC motor in how it functions and how you as a user use it well I'm going to guess that a DC motor you put direct current through it okay a DC motor no I have no idea mostly I'm a turn lawyer so I don't know how to I am sorry if you're sorry don't there non-returnable but what's with some difference I mean there are a lot of technical differences between servo motors and DC motors but for the use case of it DC motors are very easy to control the velocity of the more the speed of them okay so how fast they spin where as servo motors you control the position so it's everywhere you would want to use in one of those claws that goes and picks up the animal like you want it to be in a specific location but then you don't want a good claw that actually picks up the animal because you don't want any of the children to win any prizes no because you just face the world because you're terrible corporate yeah monsters no we should build a claw machine for the greater good that takes it up every time everybody wasn't a fantastic idea but I have a feeling that if you tried to do you me like really long time vision like we would end up beheading the toilet that would be justice on projects when I in a claw machine it actually got it but then it just like completely crumble everything and gives it to you I might have to build that I'm just remember that it's started right here and this is payback time this is this you might you might have this one I always confuse the two I think triple question hey what's the difference between a bit and a bite oh I can do them as well okay so one of them is eight of the other a bit is smaller and a byte is larger so a byte is eight bits because I know and we got what do you think people would think that we had just gone to I don't know maybe to the dentist and we had to pull out a lot of teeth I was thinking like we taught first graders and we were like you input these wherever you want and they were like putting all your back last question bonus question is this what I level up in my physics game this is when you level up so you have two sticks it takes an hour to burn each stick if you wanted to time an hour for example you could just burn the whole sticks how do you time 45 minutes and they burn it varying rate so you couldn't just like mark it in half and say okay it's burned halfway so now it's been so long the length of the stick it burns a different rate so you couldn't just like gauge when it's halfway or when it's like three-quarters of the way to six to six you say Alexa set a timer for 45 minutes 45 minutes starting here and 45 minutes through me like oh you can burn them from both ends oh that Kasai you can time half an hour mm-hmm burn one from both ends very like you need one and a half hours I got you girl I'll only read 45 minutes late Oh what is you okay ah okay I got it you burn one of them for both ends a hot one from one end when the one that breaks for both ends was burnt out you turn it like the other end of the longer girl yeah yeah you are smelling nothing you know me yeah I love it we're out oh yeah great in the middle I think that was amazing nothing I expected you to do poorly it just not like I put you in a spot in front of the camera and ask you some tough questions good job hold it thank you I'm Emma's video I just I do doubt we're losing it right back together Lego cream yet thank you so much Simone for letting me put you through that thanks for having me that is fun I was super fun yeah I feel the physics part of my brain being like it's blossoming just a little I hope something to work on the robotic you yeah I've got plenty of ideas and they use those for watching this madness subscribe if you want more physics videos usually they're more physics fees but this is fun and it's a notification button I guess they do that people do that if you want more innovations all we could do cut yeah you could keep changing things out I'll let the notification button in each channel you should get offline when you know I'd love to get notepad and check out Simone's channel and happy physic thing it feels weird because we're at your channel but we're not you wearing my hair at your house yeah the way to become a team again you're just anxious that around me like go this is my show here yeah I don't think your hair to be able to get through to filming this Howry ever I do know what's funny your grandma an Italian [Music]