ib 1.2 measurements and uncertainties

Question 1 The order of magnitude of the diameter of a Helium nucleus is

• A 10¹⁰ m
• B 10³⁰ m
• C 10⁻¹⁰ m
• D 10⁻¹⁵ m

Question 2 The end of a ruler is broken, this will affect:

• A both precision and accuracy
• B only precision
• C only accuracy
• D neither accuracy nor precission

Question 3 The mass of an object is 10.0 ∓0.2 kg and its volume is 2.0 ∓0.1 m³. The % uncertainty in the density (mass/volume) is:

• A 5%
• B 10%
• C 2%
• D 7%

Question 4 Which of the following is the best estimate, to one significant figure, of the quantity shown below? Π x 8.2/ (√16.1)

• A 1.5
• B 6
• C 3
• D 6.4

Question 5 A student measures two lengths as follows: L₁ = 10.0 ∓ 0.1 cm L₂ = 20.0 ∓ 0.1 cm What is the % uncertainty in L₁ x L₂ ?

• A 1%
• B 15%
• C 0.5%
• D 1.5%

Question 6 A student measures two lengths as follows: L₁ = 10.0 ∓ 0.1 cm L₂ = 20.0 ∓ 0.1 cm What is the % uncertainty in L₁ + L₂ ?

• A 0.5 cm
• B 0.2 cm
• C 0.1 cm
• D 0.45 cm

Question 7 A student measures the time for 10 swings of a pendulum to be 25.0 ∓0.1 s. The uncertainty in the time for one swing is:

• A 0.001 s
• B 0.1 s
• C 1.0 s
• D 0.01 s

Question 8 The order of magnitude of the mass of an apple is:

• A 1 kg
• B 10 kg
• C 0.01 kg
• D 0.1 kg

Question 9

• A 18.40 ∓ 0.05 cm
• B 18.4 ∓ 0.1 cm
• C 6.5 ∓ 0.5 cm
• D 6.4 ∓ 0.1 cm

Question 10

• A dependent on how the clock is used
• B ∓0.5 s
• C ∓ 1 s
• D ∓ 2 s