4

20:The Vernier caliper reading is (abai 2)30 40 100 mI 39uLuGullufSullu SGuuluuzGul8 BAu ?GuULle 8TXXX 8 ! & 9120mm 28.75mm 26.65mm 36.75mm 34.65...

Question

20:The Vernier caliper reading is (abai 2)30 40 100 mI 39uLuGullufSullu SGuuluuzGul8 BAu ?GuULle 8TXXX 8 ! & 9120mm 28.75mm 26.65mm 36.75mm 34.65

20 :The Vernier caliper reading is (abai 2) 30 40 100 mI 39uLuGullufSullu SGuuluuzGul8 BAu ?GuULle 8TXXX 8 ! & 91 20 mm 28.75 mm 26.65 mm 36.75 mm 34.65



Answers

Which of the following is the most precise device for measuring length : (a) a vernier callipers with 20 divisions on the sliding scale (b) a screw gauge of pitch $1 \mathrm{~mm}$ and 100 divisions on the circular scale (c) an optical instrument that can measure length to within a wavelength of light?

So this question once you to solve how many millimeters are there in 2.5 times 10 to the power of two kilometers. So we have two conversion factors that we can use. We can first convert kilometers, two meters and then we can further convert meters two millimeters. And because our initial value of kilometers is given in scientific notation, let's just keep it simple and keep everything in scientific notation. So the way that you want to solve this is using dimensional analysis. And when you saw that you want to start with, you're given value. So let's start. We have 2.5 times 10 to the power of two kilometers. And so now we can multiply this by our first conversion factor where we know one kilometer is equal to one times 10 to the power of three meters, and now we can multiply. This also by our second conversion factor. Where we use one meter is the older one times 10 to the power of three millimeters. Now, before we actually solved this, it's always a good idea to just go through and make sure you put your numerator and denominator in the right places to make sure that all of your units cancel. So we have kilometers and kilometers can cancel and meters and leaders can cancel and we're left with millimeters, which is our desired unit. So then we can multiply through using rules for multi playing scientific notation. So the first thing you want to do is all of your co efficiency of 11 in in 2.5. You want to multiply those together so 2.5 times one times one is you got a 2.5. And for our exponents because we're multiplying everything together, you just add them. So you have to plus three plus three and so two plus three plus three, there's going to be equal to 2.5 times 10 to the power of e millimeters. And this value makes sense because since kilometer is a much larger unit, you can measure the same area using a smaller number. And because millimeter is much smaller, you need a lot more millimeters to make up the same length and kilometers, so it makes sense of this value is larger

In this question, we have given a thermometer and it is graduated in mm and it just registers -3 mm. When the bulb of thermometer is in pure melting ice and it reads 22 when the thermometer is in esteem at a pressure of one atmosphere, that now we have to find the temperature in degrees Celsius. When the thermometer register 13. So we can say that. Yeah, the change In reading that is 20 to minus This is -3 equals to 25 mm. This is the changes leading. That is 25 mm. Land. His corresponds to an interval of 100 years, says yes. So Now we have given the reading that is 13 -3 and it will come out to be 16. A memo of land right corresponds to So this is 100 upon 25- 16. This will comes out to be beautiful. So, this is our answer. We have to find us here in this form only. So this is the answer. When she said that, what? That option B is the correct choice. Thank you

This question they're asked. Age which metric unit you will use? Okay, that's right. Two major Yeah. The thickness Okay. Of hypodermic niggle. What from kilometers meters centimeters or millimeters? The metric unit? All right. We will use to measure that night thickness of hypothermic needle is millimeters because the thickness of high permit is in the range of millimeter, which is the answer this question. Thank you for what you do.


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