# Question Video: Measuring the Diameter and Thickness of a Coin | Nagwa

### Video Transcript

The diameter and thickness of a mint are measured to be 2.4 centimeters and 2.36 millimeters, respectively. Which of the follow tools can be dear used to measure these lengths ? ( A ) A standard meter, ( B ) a meter tape, ( C ) a regular rule, or ( D ) a vernier caliper. Before we look at these individual tools though, let ’ s expression at the mint first. A coin ’ mho diameter is how wide it is from one end to the other, which in this case is 2.4 centimeters. But coins are not fair two-dimensional circles which normally depict people who are very fat and very dead. No, they besides have a thickness to them. Looking at it from the side, a mint ’ second thickness is the distance from the front face to the back expression of the coin, which is given as 2.36 millimeters. So the creature that can best measure these lengths has to be able to measure centimeters, millimeters, and fractions of millimeters. Let ’ s start by looking at the standard meter. The criterion meter is, as the name might imply, one meter long, or precisely 100 centimeters. And every single one of these centimeters are marked, all the room up to 100. And in between the centimeter markings are millimeter markings, which means that the shortest distance the standard meter can accurately measure is one millimeter. This means the standard meter would work great for measuring the diameter of the coin, since it ’ mho 2.4 centimeters. Or since one-tenth of a centimeter is equal to one millimeter, another way we can put 2.4 centimeters is as two centimeters and four millimeters, both of which can be measured on the standard meter. however, there is even a problem with measuring the thickness of the coin, since the standard meter can merely measure fully millimeters and not fractions of millimeters. So the standard meter is credibly not the best choice. These same principles apply for the regular ruler as well, since it ’ s good like a meter stay, except shorter. It still only measures centimeters and wide millimeters, meaning it ’ s not the best tool for measuring this coin.

sol let ’ s count at the meter record then. It has markings for centimeters and in between those markings for entire millimeters, just like the regular rule and standard meter. This means that the only creature that we have left that could be the best instrument is the vernier caliper. Unlike the other three tools, the vernier calipers have two scales, the main scale, located here, which measures centimeters and millimeters, just like our first three tools. But there ’ s the other scale besides, called the vernier scale scale. The vernier scale is used to measure in between each millimeter marking on the chief scale and has an accuracy of up to 0.02 millimeters. This vernier scale scale accuracy allows us to measure the fractions of millimeters needed to measure the thickness of this mint. And the main scale of this vernier scale caliper silent allows us to measure the diameter of the coin. So we can measure both the thickness and the diameter using barely the vernier scale calipers. Because of this, the answer for “ Which of the surveil tools can be used to best measure these lengths ? ” is ( D ) a vernier caliper .

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Category : Finance