Module 1 and 2 Retrieval

Select 3 SI base quantities.

• Charge

• Force

• Mass

• Length

• Luminous Intensity

Select 3 SI base quantities.

• Time

• Electric current

• Amount of substance

• Moment

• Momentum

Select a SI base quantity and its unit.

• Temperature

• Mass

• Celsius

• Kelvin

• Grams

If a formula is homogeneous, what does it mean?

• It agrees with theory

• The units of one side are the same as the units of the other

• It shows a directly proportional relationship

• It is from classical rather than quantum physics

The prefixes tera, centi and femto mean:

• x10^12, x10^-2, x10^-15

• x10^15, x10^-2, x10-15

• x10^12, x10^-3, x10-15

• x10^12, x10^-2, x1--12

The true value of a quantity would theoretically be found by using...?

• A perfect measuring instrument

• An electronic balance

• It can't be found

The error in a measurement is...?

• The difference between the measured value and the true value

• The smallest increment on the measuring device

• Due to human error such as misreading

The absolute uncertainty in a measurement is...?

• An estimate of the maximum error of a measurement

• An estimate of the minimum error of a measurement

• An estimate of the error of a measurement expressed as a ratio of the true value

In many circumstances, the absolute error in a measurement is equal to...?

• Plus/minus the smallest increment that the instrument can measure

• The zero error on the measuring instrument

• Human reaction time

When adding or subtracting two or more measurements, we find the overall uncertainty by...?

• Adding or subtracting the percentage uncertainties

• Adding the percentage uncertainties

• Adding or subtracting the absolute uncertainties

• Adding the absolute uncertainties