## Physics: Esercizi sulla misura e sulla notazione scientifica

Di seguito alcuni esercizi utili per le attività nelle classi in cui sono stati attivati dei percorsi CLIL di Fisica.

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