ib 1.1 measurements

Question 1 Which of the following is not an SI base unit?

• A volt
• B kilogram
• C kelvin
• D mole

Question 2 What are the SI base units for frequency, f?

• A s
• B s⁻¹
• C s⁻²
• D s⁻³

Question 3 Which line in the table shows the metric multipliers in order of increasing value?

• A μ c k G M
• B G T n c p
• C k n M T G
• D p n c G T

Question 4 Which product-pair of metric multipliers has the greatest magnitude?

• A pico x mega
• B nano x kilo
• C micro x giga
• D milli x tera

Question 5 Which of the following values is not given to 3 significant figures?

• A 4.00 x 10²
• B 5190
• C 6230.00
• D 50300

Question 6 A physicist measured the reaction time of a person pushing a buzzer to be 0.00289354 s. Which answer gives the measurement to 4 significant figures?

• A 0.0028
• B 0.002893
• C 0.003
• D 0.0028935

Question 7 What are the SI base units for gravitational field strength, g?

• A N
• B ms⁻²
• C Nkg⁻¹
• D Jkg⁻¹

Question 8 Some physical quantities can be measured directly, whereas others can only be estimated. Which of the following rows in the table is correct? physical quantity measurable or estimated

• A length of a football field estimated
• B age of the universe measurable
• C potential difference of a mains supply estimated
• D speed of sound measurable

Question 9 The length of a bacterium is approximately 2 × 10⁻⁶ m, and the distance from Earth to the Moon is approximately 3.8 × 10⁸ m. How many orders of magnitude greater is the distance from Earth to the Moon than the length of a bacterium?

• A 10²
• B 10⁶
• C 10¹⁴
• D 10²²

Question 10 Cape Town is 9 700 000 m from London. What is the order of magnitude of this distance?

• A 10⁶
• B 10⁷
• C 10⁸
• D 10⁹