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Lecture

# 1-Introduction-Practice.pdf

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School
Department
Physics
Course
PHYSICS 1L03
Professor
Reza Nejat
Semester
Fall

Description
Phys 1L03 Conceptual questions I-Introduction 1. A rectangular strip is measured as 32.30 m by 210 m. Find the area of the strip to the correct number of significant figures. 3 2 a. 6.7830 x 10 m b. 6.783 x 103 m 2 3 2 c. 6.78 x 13 m 2 d. 6.8 x 10 m e. 7 x 103 m 2 2. Use the rules of significant figures, the addition of 21.4+15+17.17+ 4.003 is: a. 57.573 b. 57.57 c. 57.6 d. 58 e. 60 3. What is the sum of three numbers 2.06000, 3.163, and 1.12 , taking into account significant figures? a. 6.34300 b. 6.343 c. 6.34 d. 6.3 e. 6 4. How many significant figures should be written in the sum of 87.4 kg + 15406.6 kg + 278.39 kg + 9632.1 kg + 0.9720 kg + 1.3 kg? a. 1 b. 2 c. 4 d. 5 e. 6 3 -2 5. What is the multiplication of three numbers 1.1 x 10 , 2.48x10 , and 6.000, in scientific notation and with the correct number of significant figures? a. 1.6368 x 10 2 2 b. 1.637 x 12 c. 1.64 x 10 d. 1.6 x 102 3 e. 1.6 x 10 6 6. In a multiplication operation involving the numbers 26548, 312.09, and 419.0 x 10 , the result should be rounded to how many significant figures? a. 3 b. 4 c. 5 d. 6 e. 7 7. How many inches are in 30.7484 miles? [1 mi = 1.61 km, 1 mi = 5280 ft] a. 1.34 x 10 4 5 b. 1.34 x 10 c. 7.60 x 10 5 d. 1.20 x 10 6 6 e. 1.93 x 10 8. How many millimeters are in 12.45 kilometer? 4 a. 1.245 x 10 5 b. 1.245 x 10 c. 1.245 x 10 6 7 d. 1.245 x 10 8 e. 1.245 x 10 2 2 9. What is the area of a 2640 ft in m ? [1 ft = 12 in] 1 a. 8.05 x 10 b. 2.45 x 10 2 2 c. 8.05 x 10 3 d. 2.45 x 10 e. 8.05 x 10 3 10.A Greek runner said he can run with average speed of 23 rides per hour. The ride is an ancient Greek unit of length, as are the stadium and the plethron. If 1 ride is 4 stadia, and 1 stadium is 6 plethra, and assume that 1 plethron is 30.8 m; how fast he can run in km/s? a. 7.9 x 10 – 4 km/s – 3 b. 1.2 x 10 – 3
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