Derived or Quantity (Symbol) Unit Symbol Fundamental Length (1) 1. meter m Mass (m) kilogram kg 2. "ime (t) second 3. rea (A) square meter m2 4. Folume (V) cubic meter 5. m3 "emperature (T) Kelvin K 6. kilogram per cubic 7. Density (D) kg/ m3 meter peed (v) /Velocity (v) meter per second m/s 8. Electric current (I) Ampere A 9. meter per second 10. acceleration (a) m/s² squared Pressure (P) Pascal Pa or N/m² 11. amount of substance mole mol 12. Force (F) /Weight (W) N or kg-m/s² Newton 13. Vork (W) Joule Jor N· m 14. Luminous intensity (I) candela cd 15. Power (P) Watt W or N · m/s 16.|

Derived or Quantity (Symbol) Unit Symbol Fundamental Length (1) 1. meter m Mass (m) kilogram kg 2. "ime (t) second 3. rea (A) square meter m2 4. Folume (V) cubic meter 5. m3 "emperature (T) Kelvin K 6. kilogram per cubic 7. Density (D) kg/ m3 meter peed (v) /Velocity (v) meter per second m/s 8. Electric current (I) Ampere A 9. meter per second 10. acceleration (a) m/s² squared Pressure (P) Pascal Pa or N/m² 11. amount of substance mole mol 12. Force (F) /Weight (W) N or kg-m/s² Newton 13. Vork (W) Joule Jor N· m 14. Luminous intensity (I) candela cd 15. Power (P) Watt W or N · m/s 16.|

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter1: Introduction: The Nature Of Science And Physics

Section: Chapter Questions

Problem 19PE: (a) If your speedometer has an uncertainty of 2.0 km/h at a speed of 90 km/h, what is the percent...

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A marathon runner completes a 42.188-km course in 2 h, 30 min, and 12s. There is an uncertainty of 25 m in the distance traveled and an uncertainty of 1 s in the elapsed time. (a) Calculate the percent uncertainty in the distance. (b) Calculate the percent uncertainty in the elapsed time. (C) What is the average speed in meters per second? (d) What is the uncertainty in the average speed?
(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?
Consider the equation s=s0+v0t+a0t2/2+j0t3/6+s0t4/24+ct5/120 , were s is a length and t is a time. What are the dimensions and SI units of (a) s0 , (b) v0 , (c) a0 , (d) j0 , (e) s0, and (f) c ?
(a) A person's blood pressure is measured to be 1202 mm Hg. What is its percent uncertainty? (b) Assuming the same percent uncertainty, what is the uncertainty in a blood pressure measurement of 80 mm Hg?
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?
In SI units, speeds are measured in meters per second (m/s). But, depending on where you live, you’re probably mole comfortable of thinking of speeds in terms of either kilometers per hour (km/h) or miles per hour (mi/h). In this problem, you will see that 1 m/s is roughly 4 km/h or 2 mi/h, which is handy to use when developing your physical Intuition. More precisely, show that (a) 1.0m/s=3.6km/h and 1.0m/s=2.2mi/h .
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6. Convert the following measurements mg.um kg.m а. 68 ms? hr2 b. 49mg/cm³ to ng/mm³ 7. Using Dimensional Analysis, check which of the following equations is or are correct. а. рgh3 — та b. avt = vh?
1. The following data are the measurements of the dimensions of a box: l = 8.6 ± 0.5 cm h = 20.19 ± 0.01 mm w = 0.75 ± .02 mHow should the volume of the box be reported (central value ± uncertainty) incm3? Show solution.2. If the accepted value of the volume of the box in the previous question is 1300 cm3, is the measurement acceptable? Explain.
mass 9. Density = volume' Gasoline has a density of about 0.66 grams per cubic %3D centimeter. To the nearest kilogram, what is the mass of a container of gasoline that measures 30 centimeters by 30 centimeters by 30 centimeters deep? onsupse bsmrbhA136t edimsn .c B 59 O40 18