IGCSE Physics: Measurements

hello everyone welcome back to this channel so in today's video I want to announce that I'll be starting a new video series on IGCSE physics so there will be 25 videos coming up including this one that will help you to understand the whole syllabus from A to Z so without further Ado let's dive into chapter one making measurement and in this chapter alone we will learn how to measure four different quantities length volume time and also density and they might sound really trouble so let me explain why are what are the reasons that we learned this so one example I can think of why measurement is important and it's in this Mass climate orbital incident so what NASA did is that they sent out this Orbiter to basically orbit the mask to study the properties of mass and unfortunately they make a measurement arrow and specifically they uses the wrong unit for part of the measurement so it's they use pounds four seconds instead of Newton seconds we'll talk more about what they are later but because of this minor Arrow the mission add up to fill and it causes millions of dollars for this failed project and the cause is just a measurement mistake so now I hope that this example gives you some motivation to keep learning in the following slides so let's look into how we can measure length properly so and the lap length often using a ruler in fact we use rule every day in our daily life but it's important on how we make use of the Rolo battle and here are some of the example of what we need to measure and some of it would be a piece of wire let's say you're doing an electricity experiment to investigate how length of y affect resistance so we need to measure the length of wire and here are some of the precautions first of all your wire must be sprig and the wire must start at the zero point so they got the exact figure and last but not least the rule has to be calibrated calibrated well means that from 0 to 1 it is exactly one cm instead of you know 0.8 and that would end up causing a huge mess a little arrow will cause a big our um bigger arrow in the actual experiment so that's one example and a second example where we need to measure is the thickness of something for instance here we have paper it's not easy to measure just the thickness of one paper so here's an example of how to do that we stacked up all the papers like 500 and then measure the thickness of the 500 pieces of paper using a row look and to get the thickness of one paper we simply divide it by 500 to get the thickness of one shaped and another example would be a threat all right how do we measure a thread so it's very much like how we measure wire you need to lay a thread on the line and then put the line on the Rolo to get the exact measurement on how long is the thread so here are just three examples of how you can measure the length and here I want to introduce another concept which is super important throughout the course it's called the SI unit so as I units is basically a standardized unit that is used throughout the world it means that these units are distended for scientists all around to work so for length the SI unit is going to be an CM all right or meter sometime it should be meter the SI unit is meter and of course we can change it by using different prefixes oops like Senti deci mini micro killer so do know that this amp here it is the SI unit when it comes to a lot of measurement question you need to do in the future and and this is important because imagine that you are staying in England they might be using a mouse system instead of a kilometer system so there's a big difference between kilometers and mouse and therefore it's good to for scientists to have a standardized unit in this case the SI unit all right so let's try it out some positive questions um in fact throughout the whole syllabus you do a lot of positive questions just to prepare you to age your exam so here this student want to determine the circumference of a wooden Tower she puts a marker on the tower this Mark here and then Rose it along the ruler three times before the reading the position on the ruler at which It Stop So to solve this problem we need to understand the context so this ruler here is spin three times and we know that after it spins one time it should be the circumference we should be able to get the circumference of the circle so let's look at what is the length the starting point on the mark so this is the starting point which is 1cm so do note that the scale here is from 0 to 5 so each bar here represents one cm and it started at 1 cm and after one cycle we look at whether when it stops it stops at 13 cm so this means that the whole circumference of the circle has traveled one one cycle and in order to get the circumference we simply use 13. let me use another pen the ball pen instead 13 cm minus 1 cm we got 12 CM and this will be the circumference of the Delver so the answer is a and let's move on yeah the answer is a so the second thing that we'll measure in this chapter is volume um some of you might have already done it and um your mathematics subject so here we have some regular um shapes here we know that to calculate the volume of a cubic we use we multiply the length times width times height whereas for the volume of sphere you might remember this formula for over 3 pi r Cube and for comb if I mount mistaken should be one over three Pi R square h and we have different formulas to calculate the volume of regular shapes but one thing that some of you might not know is how to calculate the volume of an irregular shapes like this like a stone here and the way we do that in physics is to use a method called the water displacement method where we put we prepared a measuring cylinder we put in some water and then measure the initial volume of it and because The Rock has volume therefore when we put the rock into the measuring cylinder we'll see an increase in the volume of water inside the measuring cylinder so in order to calculate the volume of the rock we simply use the final volume and subtracted by the initial volume and this will give us the volume of the Rock and this is called water displacement method and we here we have a new equipment that you need to know is basically called measuring cylinders they are they are used in water displacement method basically a cylinders that has measurement beside of it all right and the SI unit again for different units we have different SI unit and the SI unit for volume is meter cube but of course you can always ask prefixes to make it send cm2 or dmq so it should be Dusty Alright by the way if you are interested in getting the slides here you can always download it on my website for free for chapter one but if you are a teacher or student would like to use this slice for revision purposes then you can purchase them on my personal website and thank you for supporting and let's move on to how we can measure time and measuring time is super super simple and sometimes we need to measure time because um throughout your journey you'll be required to do some experiments on for instance how long does it take for water to heat up and comparing different liquids and also of how long an electric current is Flowing so to measure time we use clock and we have two simple clocks here analog clocks and also digital clocks something that's very common sense whereas um digital clock here is more accurate because they sometimes have additional time like milliseconds nanoseconds and so on and so forth and another way a traditional way of measuring time is using a Matlab pendulum and you might thought why would we need this thing right this is because sometimes what if you don't have a clock in your hand and you can create a timing device using this lab pendulum and it works because it oscillates at a very constant hear it and the time for one's oscillation moving from left to right right to left is called a period and because the pendulum swings at a steady rate they are used sometimes to conduct experiments and in order to calculate how long it takes to oscillate we can use the stopwatch and of course when we measure that we need to do many oscillations so that the timing Arrow the reflection Arrow will be will be lower that means the time for for human to react when they press the start install button and that's not watch so this is La pendulum and of course we can mod we can change how long each oscillation is by changing the length of the wire here all right so let's move on so here's another puzzle question a student is trying to see how quick they can run one way I would recommend all of you times to pass your question is to underline the key term here you cannot use highlighter but you can underline the keyword and lastly the reason that if they know how fast they can run one lap they can assume they will run at the same speed for 5 kilometers which is extremely hard but that's the question and can calculate that predicted time they correctly reasoned that they will not be able to maintain the initial Pace throughout the whole 5km so they decided to time lap five the diagram shows the reading on the stopwatch at the beginning and the end of the lab so how long does it take so remember that they are running for one lap so this is only one left and the amount of time we need to measure to in order to order how much they can travel in five kilometers we need to First measure how much they can run in 400 meter so in this case um this the end of lap is 11 10. the start of lab is um 913 so we can use the subtraction here but of course in this case we know that one minute is equivalent to 60 seconds so I'm going to change it to 10th and 70 so that I can subtract it so I have 55 seconds and 1 minute and 55 seconds for 400 meter all right so in order to calculate how much they travel in five kilometers we can use so we know that for they travel 400 meter and for 100 one minute and 55 seconds and for five kilometers how will they travel and we know that 400 kilometers if you multiply by and let's use the calculator because I can't do it that quick oops five thousand is 12.5 times so five kilometers is 12 of 5 times 400 meter so we can do the same to our time here so we can first convert this into a second and then multiply 117 multiply by 12.5 we know that they will spent 1462.5 seconds um to run the whole 5 km but we do need to convert it into minutes it will be 24 minutes and 22 seconds so I know the calculation part is a little bit hard so if it's okay if you don't get it you can pause the video and try to solve it yourself but that's basically how the questions on your exam will be like they're usually complicated and requires a lot more time to solve so that's measuring time and then question here we know that the answer is B and let's move on to density and some of you might have learned it in year 9 math so so far we have to learn how to measure length and also measure volume so density is basically how concentrated a matter an object masses so we can here is a visualization a dense object would have a lot of matter concentrated in a small little Loom whereas a less than abstract here will have less matter concentrated in the same amount of volume here okay and the formula to calculate density is to use mass divided by its volume so and let's look at the your some of the units for density if let's say the mass that you are using is gram and volume is CM Cube your unit of density is gram divided by CM Cube so it should be a session and then if your unit is kg and CM Cube you'll get kg cmq and so on and so forth all right and the implication of density this one um should be quite simple if an object is denser than water it was sink whereas if it's less dense than water it will float instead so let's look at some of the work examples to help you understand how to solve it so a sample Eternal has a volume remember to be underlined the key term and the mass is 190 gram what is the density and because we know that the mass is 190 we can just plot that in value into our equation 190 divided by the volume 240. and because the volume here the mass here is of um has the unit gram I can just write it down here for my visualization and CM Cube and if I plug this value into the calculator 190 divided by 240 I'll get 0.79 a recommended way to write your answers you know you will get a lot of continuing numbers here but then it's good to always write in three significant figures so I'm going to write 0.792 and I just plug in the unit gram because CMS here is at um at the bottom at the denominator so this is why I will put a slasher and then write down the unit and that's how you construct a unit for a term basically you don't have to memorize too much just to just remember the formula and it would do so let's move on and a box of food a box full of 35 matches has a mass of 6.77 gram the Box itself has a mass of 3.77 gram what is the mass of one gram one match in grams so this is a math question right so basically um the doter is 6.77 gram and then the box is 3.37 gram so we know that the mass for the 35 matches will be 6.77 minus 3.37 which is 3.4 kilogram and in order to find the mass of one match you can just do one match it can basically divide 3.4 by 35. and the answer you get is zero point remember three significant figure 0.097 what about your unit it's the same as the grams here so I'm going to put 0.097 gram and let's move on a Buffs um now we need to calculate the volume in cm Cube so here is the specific requirement here that we need to give our answer in this unit but then if you look at the dimension they give us 42 millimeter 2.3 millimeter 2.3 millimeter the width length and height and this is when something becomes trickier because the answer requires us to write in cmq meaning we need to convert millimeter the dimension to centimeter before we do any calculation so I'm going to convert 42 to 4.2 cm 22.3 mm is equal to 0.23 cm and I can then calculate the volume by multiplying them together 4.2 CM multiplied by 0.23 multiply by 0.23 and if I plug all the values into the calculator I will get the answer of zero point two two two and the unit cmq and here it that is that we have the volume of the mattress so last but not least we need to calculate the density of one match sheet so to calculate the density we need the mass and also the volume so from the previous two example the mass of the match is 0.097 and then the volume of it is 0.222 so again I just plug the values into the formulas and then use my calculator to calculate what is the density of my match so here we have 0.43 7. gram slash cmq remember to use the unit that the message to follow the unit of mass and volumes so here we have another way to find the density of liquid so this is for liquid specifically again we remember that density formula for density is mass divided by volume to calculate the density of liquid we just have to measure the mass of liquid and also measuring the volume of liquid and one simple way to do this is to put a measuring cylinder on a beam balance and then before measure the initial mass and important the water so we can see that here that the changes to 70 minus 50. so we know that the volume of the water at 20 maybe CM Cube all right 20cm Cube and then sorry the mass of the water sorry I made a mistake so the mass of the water is 70 gram minus 50 gram got 20 grams here and here we have the mass already and then to measure the volume we can just look up the reading here volume and after getting the mass and volume I just plug it into the formula and then we'll have gotten the density so that's about it to on how to calculate the density of liquid and before the end this video let's try out a few more positive questions so how can the student it's a format question measure the volume of one of the coins using the setup and I have attached the markings game here you can refer to it but a very simple thing to do is first to fill up to fill up the water fill water into this measuring cylinders and then we can put all the coins in coins in okay before we put in all the coins we need to measure the initial volume and having put all the coins into um the measuring cylinders we can measure the final volume so in order to calculate how what is the volume of one coin we can just use final minus initial and then divide it by the number of coins that we put into the measuring cylinders so that's one way we can all answer the question remember always if it's a four point question in your IG exam meaning you are likely needed to give four additional points so try not to be too lengthy but give the correct points in your exam and last question three blocks are put into three measuring cylinders and these are shown below so which rows in the table shows the Block in order of increasing volume so um we can just see that we can just check which one which measuring cylinders has the low versus increase in volume then we know that um this the blocks have the lowest volume because this is essentially of what the displacement method so I can see that Zach here has the low version increase in volume so that should be the smallest and the second increase in volume should be here x they only increase by 30. whereas the first one it increased by around 30 sorry I'm 27 if we look at the reading here they started at 43 they ended at 20 70 so it reached 37 whereas the last one they started at 25 and it ended at 85 so increase around 60. so we know that the order is deck X and also y so the answer is donkey so here it is we have our final answers so to sum up this chapter we have learned how to measure volume length density properly so um in the next chapter we'll learn how the different formulas and I'm sorry about speed and accelerations I'll see you then goodbye

hello everyone welcome back to this channel so in today&#39;s video I want to announce that I&#39;ll be starting a new video series on IGCSE physics so there will be 25 videos coming up including this one that will help you to understand the whole syllabus from A to Z so without further Ado let&#39;s dive into chapter one making measurement and in this chapter alone we will learn how to measure four different quantities length volume time and also density and they might sound really trouble so let me explain why are what are the reasons that we learned this so one example I can think of why measurement is important and it&#39;s in this Mass climate orbital incident so what NASA did is that they sent out this Orbiter to basically orbit the mask to study the properties of mass and unfortunately they make a measurement arrow and specifically they uses the wrong unit for part of the measurement so it&#39;s they use pounds four seconds instead of Newton seconds we&#39;ll talk more about what they are later but because of this minor Arrow the mission add up to fill and it causes millions of dollars for this failed project and the cause is just a measurement mistake so now I hope that this example gives you some motivation to keep learning in the following slides so let&#39;s look into how we can measure length properly so and the lap length often using a ruler in fact we use rule every day in our daily life but it&#39;s important on how we make use of the Rolo battle and here are some of the example of what we need to measure and some of it would be a piece of wire let&#39;s say you&#39;re doing an electricity experiment to investigate how length of y affect resistance so we need to measure the length of wire and here are some of the precautions first of all your wire must be sprig and the wire must start at the zero point so they got the exact figure and last but not least the rule has to be calibrated calibrated well means that from 0 to 1 it is exactly one cm instead of you know 0.8 and that would end up causing a huge mess a little arrow will cause a big our um bigger arrow in the actual experiment so that&#39;s one example and a second example where we need to measure is the thickness of something for instance here we have paper it&#39;s not easy to measure just the thickness of one paper so here&#39;s an example of how to do that we stacked up all the papers like 500 and then measure the thickness of the 500 pieces of paper using a row look and to get the thickness of one paper we simply divide it by 500 to get the thickness of one shaped and another example would be a threat all right how do we measure a thread so it&#39;s very much like how we measure wire you need to lay a thread on the line and then put the line on the Rolo to get the exact measurement on how long is the thread so here are just three examples of how you can measure the length and here I want to introduce another concept which is super important throughout the course it&#39;s called the SI unit so as I units is basically a standardized unit that is used throughout the world it means that these units are distended for scientists all around to work so for length the SI unit is going to be an CM all right or meter sometime it should be meter the SI unit is meter and of course we can change it by using different prefixes oops like Senti deci mini micro killer so do know that this amp here it is the SI unit when it comes to a lot of measurement question you need to do in the future and and this is important because imagine that you are staying in England they might be using a mouse system instead of a kilometer system so there&#39;s a big difference between kilometers and mouse and therefore it&#39;s good to for scientists to have a standardized unit in this case the SI unit all right so let&#39;s try it out some positive questions um in fact throughout the whole syllabus you do a lot of positive questions just to prepare you to age your exam so here this student want to determine the circumference of a wooden Tower she puts a marker on the tower this Mark here and then Rose it along the ruler three times before the reading the position on the ruler at which It Stop So to solve this problem we need to understand the context so this ruler here is spin three times and we know that after it spins one time it should be the circumference we should be able to get the circumference of the circle so let&#39;s look at what is the length the starting point on the mark so this is the starting point which is 1cm so do note that the scale here is from 0 to 5 so each bar here represents one cm and it started at 1 cm and after one cycle we look at whether when it stops it stops at 13 cm so this means that the whole circumference of the circle has traveled one one cycle and in order to get the circumference we simply use 13. let me use another pen the ball pen instead 13 cm minus 1 cm we got 12 CM and this will be the circumference of the Delver so the answer is a and let&#39;s move on yeah the answer is a so the second thing that we&#39;ll measure in this chapter is volume um some of you might have already done it and um your mathematics subject so here we have some regular um shapes here we know that to calculate the volume of a cubic we use we multiply the length times width times height whereas for the volume of sphere you might remember this formula for over 3 pi r Cube and for comb if I mount mistaken should be one over three Pi R square h and we have different formulas to calculate the volume of regular shapes but one thing that some of you might not know is how to calculate the volume of an irregular shapes like this like a stone here and the way we do that in physics is to use a method called the water displacement method where we put we prepared a measuring cylinder we put in some water and then measure the initial volume of it and because The Rock has volume therefore when we put the rock into the measuring cylinder we&#39;ll see an increase in the volume of water inside the measuring cylinder so in order to calculate the volume of the rock we simply use the final volume and subtracted by the initial volume and this will give us the volume of the Rock and this is called water displacement method and we here we have a new equipment that you need to know is basically called measuring cylinders they are they are used in water displacement method basically a cylinders that has measurement beside of it all right and the SI unit again for different units we have different SI unit and the SI unit for volume is meter cube but of course you can always ask prefixes to make it send cm2 or dmq so it should be Dusty Alright by the way if you are interested in getting the slides here you can always download it on my website for free for chapter one but if you are a teacher or student would like to use this slice for revision purposes then you can purchase them on my personal website and thank you for supporting and let&#39;s move on to how we can measure time and measuring time is super super simple and sometimes we need to measure time because um throughout your journey you&#39;ll be required to do some experiments on for instance how long does it take for water to heat up and comparing different liquids and also of how long an electric current is Flowing so to measure time we use clock and we have two simple clocks here analog clocks and also digital clocks something that&#39;s very common sense whereas um digital clock here is more accurate because they sometimes have additional time like milliseconds nanoseconds and so on and so forth and another way a traditional way of measuring time is using a Matlab pendulum and you might thought why would we need this thing right this is because sometimes what if you don&#39;t have a clock in your hand and you can create a timing device using this lab pendulum and it works because it oscillates at a very constant hear it and the time for one&#39;s oscillation moving from left to right right to left is called a period and because the pendulum swings at a steady rate they are used sometimes to conduct experiments and in order to calculate how long it takes to oscillate we can use the stopwatch and of course when we measure that we need to do many oscillations so that the timing Arrow the reflection Arrow will be will be lower that means the time for for human to react when they press the start install button and that&#39;s not watch so this is La pendulum and of course we can mod we can change how long each oscillation is by changing the length of the wire here all right so let&#39;s move on so here&#39;s another puzzle question a student is trying to see how quick they can run one way I would recommend all of you times to pass your question is to underline the key term here you cannot use highlighter but you can underline the keyword and lastly the reason that if they know how fast they can run one lap they can assume they will run at the same speed for 5 kilometers which is extremely hard but that&#39;s the question and can calculate that predicted time they correctly reasoned that they will not be able to maintain the initial Pace throughout the whole 5km so they decided to time lap five the diagram shows the reading on the stopwatch at the beginning and the end of the lab so how long does it take so remember that they are running for one lap so this is only one left and the amount of time we need to measure to in order to order how much they can travel in five kilometers we need to First measure how much they can run in 400 meter so in this case um this the end of lap is 11 10. the start of lab is um 913 so we can use the subtraction here but of course in this case we know that one minute is equivalent to 60 seconds so I&#39;m going to change it to 10th and 70 so that I can subtract it so I have 55 seconds and 1 minute and 55 seconds for 400 meter all right so in order to calculate how much they travel in five kilometers we can use so we know that for they travel 400 meter and for 100 one minute and 55 seconds and for five kilometers how will they travel and we know that 400 kilometers if you multiply by and let&#39;s use the calculator because I can&#39;t do it that quick oops five thousand is 12.5 times so five kilometers is 12 of 5 times 400 meter so we can do the same to our time here so we can first convert this into a second and then multiply 117 multiply by 12.5 we know that they will spent 1462.5 seconds um to run the whole 5 km but we do need to convert it into minutes it will be 24 minutes and 22 seconds so I know the calculation part is a little bit hard so if it&#39;s okay if you don&#39;t get it you can pause the video and try to solve it yourself but that&#39;s basically how the questions on your exam will be like they&#39;re usually complicated and requires a lot more time to solve so that&#39;s measuring time and then question here we know that the answer is B and let&#39;s move on to density and some of you might have learned it in year 9 math so so far we have to learn how to measure length and also measure volume so density is basically how concentrated a matter an object masses so we can here is a visualization a dense object would have a lot of matter concentrated in a small little Loom whereas a less than abstract here will have less matter concentrated in the same amount of volume here okay and the formula to calculate density is to use mass divided by its volume so and let&#39;s look at the your some of the units for density if let&#39;s say the mass that you are using is gram and volume is CM Cube your unit of density is gram divided by CM Cube so it should be a session and then if your unit is kg and CM Cube you&#39;ll get kg cmq and so on and so forth all right and the implication of density this one um should be quite simple if an object is denser than water it was sink whereas if it&#39;s less dense than water it will float instead so let&#39;s look at some of the work examples to help you understand how to solve it so a sample Eternal has a volume remember to be underlined the key term and the mass is 190 gram what is the density and because we know that the mass is 190 we can just plot that in value into our equation 190 divided by the volume 240. and because the volume here the mass here is of um has the unit gram I can just write it down here for my visualization and CM Cube and if I plug this value into the calculator 190 divided by 240 I&#39;ll get 0.79 a recommended way to write your answers you know you will get a lot of continuing numbers here but then it&#39;s good to always write in three significant figures so I&#39;m going to write 0.792 and I just plug in the unit gram because CMS here is at um at the bottom at the denominator so this is why I will put a slasher and then write down the unit and that&#39;s how you construct a unit for a term basically you don&#39;t have to memorize too much just to just remember the formula and it would do so let&#39;s move on and a box of food a box full of 35 matches has a mass of 6.77 gram the Box itself has a mass of 3.77 gram what is the mass of one gram one match in grams so this is a math question right so basically um the doter is 6.77 gram and then the box is 3.37 gram so we know that the mass for the 35 matches will be 6.77 minus 3.37 which is 3.4 kilogram and in order to find the mass of one match you can just do one match it can basically divide 3.4 by 35. and the answer you get is zero point remember three significant figure 0.097 what about your unit it&#39;s the same as the grams here so I&#39;m going to put 0.097 gram and let&#39;s move on a Buffs um now we need to calculate the volume in cm Cube so here is the specific requirement here that we need to give our answer in this unit but then if you look at the dimension they give us 42 millimeter 2.3 millimeter 2.3 millimeter the width length and height and this is when something becomes trickier because the answer requires us to write in cmq meaning we need to convert millimeter the dimension to centimeter before we do any calculation so I&#39;m going to convert 42 to 4.2 cm 22.3 mm is equal to 0.23 cm and I can then calculate the volume by multiplying them together 4.2 CM multiplied by 0.23 multiply by 0.23 and if I plug all the values into the calculator I will get the answer of zero point two two two and the unit cmq and here it that is that we have the volume of the mattress so last but not least we need to calculate the density of one match sheet so to calculate the density we need the mass and also the volume so from the previous two example the mass of the match is 0.097 and then the volume of it is 0.222 so again I just plug the values into the formulas and then use my calculator to calculate what is the density of my match so here we have 0.43 7. gram slash cmq remember to use the unit that the message to follow the unit of mass and volumes so here we have another way to find the density of liquid so this is for liquid specifically again we remember that density formula for density is mass divided by volume to calculate the density of liquid we just have to measure the mass of liquid and also measuring the volume of liquid and one simple way to do this is to put a measuring cylinder on a beam balance and then before measure the initial mass and important the water so we can see that here that the changes to 70 minus 50. so we know that the volume of the water at 20 maybe CM Cube all right 20cm Cube and then sorry the mass of the water sorry I made a mistake so the mass of the water is 70 gram minus 50 gram got 20 grams here and here we have the mass already and then to measure the volume we can just look up the reading here volume and after getting the mass and volume I just plug it into the formula and then we&#39;ll have gotten the density so that&#39;s about it to on how to calculate the density of liquid and before the end this video let&#39;s try out a few more positive questions so how can the student it&#39;s a format question measure the volume of one of the coins using the setup and I have attached the markings game here you can refer to it but a very simple thing to do is first to fill up to fill up the water fill water into this measuring cylinders and then we can put all the coins in coins in okay before we put in all the coins we need to measure the initial volume and having put all the coins into um the measuring cylinders we can measure the final volume so in order to calculate how what is the volume of one coin we can just use final minus initial and then divide it by the number of coins that we put into the measuring cylinders so that&#39;s one way we can all answer the question remember always if it&#39;s a four point question in your IG exam meaning you are likely needed to give four additional points so try not to be too lengthy but give the correct points in your exam and last question three blocks are put into three measuring cylinders and these are shown below so which rows in the table shows the Block in order of increasing volume so um we can just see that we can just check which one which measuring cylinders has the low versus increase in volume then we know that um this the blocks have the lowest volume because this is essentially of what the displacement method so I can see that Zach here has the low version increase in volume so that should be the smallest and the second increase in volume should be here x they only increase by 30. whereas the first one it increased by around 30 sorry I&#39;m 27 if we look at the reading here they started at 43 they ended at 20 70 so it reached 37 whereas the last one they started at 25 and it ended at 85 so increase around 60. so we know that the order is deck X and also y so the answer is donkey so here it is we have our final answers so to sum up this chapter we have learned how to measure volume length density properly so um in the next chapter we&#39;ll learn how the different formulas and I&#39;m sorry about speed and accelerations I&#39;ll see you then goodbye

Transcript for:IGCSE Physics: Measurements

Transcript for:
IGCSE Physics: Measurements