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PHYSICS 1L03 (115)
Reza Nejat (43)
Lecture

# Set-1-Key.pdf

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

Description
Phys 1L03 Tutorial problems Set 1, Key Unit, Significant Figures 1. b 2. c 3. b 2 4. m/s 2 2 5. Both sides have the same unit: m ≡ m 6. g ≡ L/T 2 ≡ m/s 2 7. a 8. c –2 9. 5.05 cm ≡ 5.05 x 10 m 10. a. 4 sig. fig, 1.0 m b. 3 sig. fig, 8.0 cm c. 5 sig. fig, 16 kg –3 d. 2 sig. fig, 0.015 ms ≡ 1.5 x 10 ms 11. 6.08 x 10–2 m 2 –2 2 12. 1.1 x 10 m 13. 6.3 cm 14. 5.5 x 103 kg/m 3 15. b 2 16. M/T 17. 3 a. L b. Volume 18. a. M/T b. M/L 8 19. 4.78 x 10 2 20. 1.244 x 10 Assigned Problems from Book: MC-1.3: e MC-1.4: a P-1.10: (a) 2.072x10 km/h, (b) 5.756 m/s, (c) 5.756x10 km/h, (d) 2.072x10 km/h, -3 5.7(e) x10 μm/ns P-1.12: (a) 6x10 cm , (b) 6x10 mm , (c) 6x10 μm , (d) 6x10 m , (e) 6x10 -8km 2 P-1.15: (a9 wrong, (b) wrong, (c) correct, (d) wrong P-1.22: 10 teaspon, 1 s/spoon, ~ 40 years P-1.26 ~ 10 13 Estimation–Order of Magnitude 1. # hairs = 10 5 2. • All growth occurs between the ages of 1 and 18 • The-6verage male grows to be about six feet tall • 10 mm/s 3. 6 3 3 −8 3 • V water= Ad = 10 m , V drop= π3r =10 m • Vwater 14 #of raindrops = V = 10 drop 4. 5 3 4 3 −10 3 • V beach sand Ab c = 10 m , V drop = π3r = 10 m V beach sand 15 • #of grain = = 10 V grain 1.7× 10−5 cm wear 5. = 10 −5cm /m 1 km travel 6. • There are 300 million people in the USA. • There are about 3 people per househo
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