uncertainties

To propagate two uncertainties for length measured in millimetres, you should....

• Add them together

• Take the difference between them

• Calculate a percentage uncertainty

• Calculate a fractional uncertainty

What is the prefix (metric multiplier) for x10⁶?

• Giga

• Mega

• Tera

• Deca

Which of the following is NOT a fundamental unit?

• second

• Kelvin

• mole

• Joule

Which is the correct symbol of prefix of 10 ^-12?

• f

• p

• G

• M

Which is the correct symbol of prefix for 10 ⁶?

• f

• p

• G

• M

The first length measured in a laboratory experiment is 2.5 + 0.1 m and the second length 3.4 + 0.1 m. What is the uncertainty of the sum of the lengths?

• 0.1 m

• 0.2 m

• 0.3 m

• 0.4 m

The first length measured in a laboratory experiment is 2.5 + 0.1 m and the second length 3.4 + 0.1 m. What is the uncertainty of the difference in the lengths?

• 0.1 m

• 0.2 m

• 0.3 m

• 0.4 m

True or False?

Zero error are random errors.

• True

• False

True or False?

Repeating a reading never removes the systematic error.

• True

• False

A student measures the acceleration due to gravity as 9.0m/s² ±10%. Is this answer valid within the experimental uncertainty?

• Yes

• No