PHYS 1111 Lab#1 Completed!

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Jan 9, 2024

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SUMMER 2022 PHYS 1111/2211 LAB #1 MEASUREMENT PROBLEMS WORK- SHEET Students: Since there was a problem with the lab-kits not being available, I am requesting you to complete this WORK-SHEET Please note that ALL your reports must be typed. However, since this is a work-sheet, I will permit you to submit handwritten work (by scanning it) this time around only. You must write a short INTRODUCTION section (at the beginning of the lab) and a short CONCLUSION section (at the end of the lab). I gained a lot of new information in this session regarding a variety of subjects. The number of digits in a value or measurement is known as a significant figure. These numbers represent a value's degree of accuracy. When you have a decimal, you can use rounding to determine the closest whole number. We use scientific notation to condense numbers that are too huge or too small to write them down. Practice Problems in Rounding 1. Round 56.84251 to the nearest: a) tenth b) hundredth c) thousandth a. 56.8 b. 56.84 c. 56.843 2. Round 97.26 to the nearest tenth: 97.3 3. Round 0.11826 to the nearest a) thousandth b) tenth a. 0.118 b. 0.1 4. Round 0.8834 to the nearest hundredth: 0.88 5. Round 11344 to the nearest a) thousand b) hundred a. 11,000 b. 11,300 6. Round 345 to nearest ten: 350
7. Round to the nearest thousand a) 99371 b) 85643 c) 1278 a. 99,000 b. 86,000 c. 1,000 8. Round to the nearest hundredth: A) 126.23500= 126.24000 B) 1.0450= 1.05 PRACTICE PROBLEMS WITH SIGNIFICANT FIGURES 1. How many significant figures are in these measurements? a. 32 cm. : 2 b. 34.6 g : 3 c. 2.489 g : 4 d. 53.670 mL : 5 e. 444.3060 km : 7 2. Round off the following to 2 significant figures. A. a. 90.356 kg : 90.4 kg B. 0.00775 mm : 0.0078 mm C. 12.34665 g : 12 g D. 1.023 m : 1.0 3. Express the answer to each of the following problems with the correct number of significant figures. a. 106.23 g + 70.0 g = 176.2, 4 figures b. 6612.335 in 2 - 5.24= 6607.10 in 2 6607.10 in^2/7 figures c. 0.09121 mm x 11.3 mm = 1.03mm/ 3 figures
d. 33.34 mL - 1.6 mL = 31.7 mL/ 3 figures e. 0.225 mg - 0.0667 mg = 0.158 mg/ 3 figures f. 55.6 kg - 4.996 kg = 50.6 kg/3 figures g. 6.335 g + 0.003 g = 6.338g /4 figures h. 123.7 mm x 0.99 mm = 120mm 2 figures i. 707.62 m/75 m = 9.4m/ 2 figures Scientific Notation Practice Express the following in scientific notation: 1. 6,000,000,000,000,000,000,000 = 6*10^21 2. 547,000 = 5.47*10^5 3. 3,507,000,000 = 3.507*10^9 4. 0.00000000000463 = 4.63*10^-12 5. 0.00090674 = 9.0674*10^-4 6. 790,640,000= 7.9064*10^8 7. 0.00000047906 = 4.7906*10^-7 8. 98,000,000,000,000,000,000,000,000,000,000 = 9.8*10^31 9. 0.000000049704 = 4.9704*10^-8 10. 0.0004650 = 4.650*10^-4 Express the following in decimal form: 1. 3.4067 x 10 7 34,067,000 2. 5.0400 x 10 -4 0.00050400 3. 4.0689 x 10 19
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40,684,000,000,000,000,000 4. 1.0015 x 10 9 1,001,500,000 5. 8.0000 x 10 -6 0.0000080000 6. 6.4523 x 10 -5 0.000064523 7. 8.213 x 10 2 821.3 Conclusion: I learned how to determine the number of significant figures in a measured value after finishing this lab. I studied the many principles that apply to the value in order to find the number of significant figures after seeing a movie on significant digits. I was able to retain abilities like rounding and applying scientific notation because of this lab.

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