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- When non-metric units were used in the United Kingdom, a unit of mass called the pound-mass (lbm) was employed, where 1 lbm = 0.4539 kg. (a) If there is an uncertainty of 0.0001 kg in the pound-mass unit, what is its percent uncertainty? (b) Based on that percent uncertainty, what mass in pound-mass has an uncertainty of 1 kg when converted to kilograms?(a) If your speedometer has an uncertainty of 2.0 km/h at a speed of 90 km/h, what is the percent uncertainty? (b) If it has the same percent uncertainty when it reads 60 km/h, what is the range of speeds you could be going?A ruler can be reasonably read down to the nearest millimeter, while a Vernier caliper can be read to the nearest 0.1 millimeter. Suppose you want to measure an object with nominal length of 2 cm with a precision as close to 1% as possible. Which instrument can you use? (You can do a calculation to figure this out.) a. The ruler or the caliper. b. The ruler. c. The caliper. d. Neither, you would need a micrometer.
- 2. Use your calculator to determine (V8) to three significant figures in two ways: (a) Find 8 to four significant figures; then cube this number and round to three significant figures. (b) Find v8 to three significant figures; then cube this number and round to three significant figures. (c) Which answer is more accurate? Explain.1. What are the values of Ax and Ay in meters? 2.What are the values of Bx and By in meters? 3.What are the values of Dx and Dy in meters?MICROMETER 1. 2. MICROMETER 10 10 20 3. 10 20 5. - 20 -20 -15 10 MICROMETER Total Reading SR TR VR Total (cm) (inch) 4 5 6. ...n %23 2. 3.
- 1. The floor of a rectangular building has an area of 120 square meter. The length of the floor / is 4m bigger than its width, w. Solve for I. Hint: Start with the equation of the area in terms of I. What kind of equation do you get? /= 48.11 X feet ! No, that's not the correct answer.2. Using dimensional equations, convert (a) 3 weeks to milliseconds. (b) 38.1 ft/s to miles/h. (c) 554 m4/(day kg) to cm4/(min g). (d) 760 miles/h to m/s. (b) 921 kg/m3 to lbm/ft3.6. Atoms of a certain element have a diameter of 108 cm. Given 1 km = 1,000 m and 1 m = 100 cm, about how many of these atoms can be fit along a line with a 1 Astronomical Unit length?
- 2. The sides of a small rectangular box are measured to be 1.80 0.01 cm, 2.05±0.02 cm, and 3.1 + 0.1 cm long. Calculate its volume and uncertainty in cubic centimeters.1. Briefly describe measurement procedure of micrometer.1. In the calculation of the perimeter of a square measuring: 5.0 cm ±.05 cm by 5.0 cm ±.05 cm, What is the + error on the calculation of the perimeter of the square? you must show the correct equation in symbolic form, and your work to receive full credit)