1.2 Quiz Uncertainty Formative

Choose the correct measurement with its absolute uncertainty for distance:

• s = 8.34 ± 0.05 m

• s = 8.34 m ± 0.05

• s = 8.34 ± 0.35 m

• s = 8.34 m ± 0.35

Choose the fractional uncertainty with 2 sig fig for time:

t = 2.47 ± 0.03 s

• 0.012

• 0.012 s

• 0.01

• 0.01 s

Given a = 23.2 ± 0.3 m and b = 8.41 ± 0.81 m

Find a + b

• = 31.6 ± 1.1 m

• = 31.61 m ± 1.1

• = 31.61 ± 1.11 m

• = 31.6 m ± 1.11

Given a = 23.2 ± 0.3 m and b = 8.41 ± 0.81 m

Find a x b without uncertainty

• = 195 m²

• = 195.1 m²

• = 195.11 m²

• = 195.112 m²

• = 200 m²

Given a = 23.2 ± 0.3 m and b = 8.41 ± 0.81 m

If a x b

What is its percentage uncertainty with 2 sig fig? (Round at the end)

Just write down the number without the "%"

Given a = 23.2 ± 0.3 m² and b = 8.41 ± 0.81 m

If a / b ≈ 2.76 m

What is its percentage uncertainty with 2 sig fig? (Round at the end)

Just write down the number without the "%"

Given a = 23.2 ± 0.3 m² and b = 8.41 ± 0.81 m

If a / b ≈ 2.76 m (3 sig fig)

What is its absolute uncertainty? (Round at the end)

Just write down the number without the units

These are the different trials for the time:

2.83

2.45

2.73

2.55

Find its absolute uncertainty

• ∆s = 0.2 s

• ∆s = 0.19 s

• ∆s = 0.2

• ∆s = 0.19

These are the different trials for the time:

2.83

2.45

2.73

2.55

Find its percentage uncertainty with 2 sig fig

• ∆s/s = 7.2 %

• ∆s = 7.2 %

• ∆s/s = 19%

• ∆s = 19%

Given a = 23.2 ± 0.3 m and b = 8.41 ± 0.41 m

If a + b

What is its absolute uncertainty?

• 0.7 m

• 0.71

• 0.06 m

• 0.062