Exercise 1. A filament has a diameter of 0.20 microns. Express this diameter in terms of a centimeter. (1 micron = 1 micrometer).
Exercise 2. Estimate the number of seconds in a human “lifetime”. We’ll let you choose the definition of “lifetime.”
Exercise 3. A cardboard box has a base that measures w = 1.92 m, and d = 0.725 m. If its height is h = 1.88 m. (a) Calculate the area of the base of the box. (b) Calculate its volume using the result of (a). (c) Calculate its volume using the formula for volume.
Q1. A kilogram is
- 10-3 grams.
- 103 grams.
- 106 grams.
- 10 grams.
Q2. A centimeter is
- 100 meters.
- 10 meters.
- 0.1 meters.
- 0.01 meters.
Q3. A megawatt is
- 106 watts.
- 103 watts.
- 10-3 watts.
- 10-6 watts.
Q4. A nanosecond is
- 10-3 seconds.
- 10-6 seconds.
- 10-9 seconds.
- 10-12 seconds.
Q5. All of the following are base units of the SI system except:
- kilogram.
- kelvin.
- meter.
- pound.
Q6. The SI prefix for 10-12 is
- tera-
- giga-
- nano-
- pico-
Q7. Given (1 angstrom unit = 10-10 m) and (1 fermi = 10-15 m), what is the relationship between these units?
- 1 angstrom = 105 fermi
- 1 angstrom = 10-5 fermi
- 1 angstrom = 10-25 fermi
- 1 angstrom = 10+25 fermi
Q8. Convert 0.75 kilometers to meters.
- 7500 m
- 750 m
- 75 m
- 7.5 m
Q9. Convert 0.0215 m to mm.
- 0.215 mm
- 2.15 mm
- 21.5 mm
- 215 mm
Q10. The number 9452 in scientific notation is
- 9.452 x 102
- 94.52 x 102
- 0.9452 x 104
- 9.452 x 103
Q11. The number .0000475 in scientific notation is
- 4.75 x 10-6
- 4.75 x 10-5
- 4.75 x 10-4
- 4.75 x 10-3
Q12. What does 1.23 + 2.50 x 10-3 equal?
- 1.23
- 1.2324
- 1.232
- 1.233
Q13. The diagonal of a square 2.0 meters on a side is
- 2.0 m.
- 2.8 m.
- 2.82 m.
- 8 m.
Q14. A 10 L container has a volume expressed in m3 of
- 0.1 m3
- 0.01 m3
- 0.001 m3
- 0.0001 m3
