Conversions & Standard Form Flashcards

All 7 cards in this deck

True or false? 1 hour = 3600 seconds.

True. $60 \times 60 = 3600$ s.

How do you convert a speed in km/h into m/s?

Divide by 3.6: multiply by 1000 (km → m), then divide by 3600 (h → s).

To how many significant figures should the mean of a set of repeated measurements be given?

The same number of significant figures as the measurements.

How many cm³ are there in 1 m³?

1 000 000 cm³ ($10^{6}$), because 1 m = 100 cm in each of the three dimensions ($100^{3}$).

To how many significant figures should you give the answer to a calculation?

The same number as the data value given to the fewest significant figures.

True or false? In a calculation with several steps, you should round the answer at each step.

False. Keep the unrounded values and round only the final answer, or the result will be less accurate.

How do you estimate the uncertainty in the mean of a set of repeated measurements?

Uncertainty = range ÷ 2, and the result is written as mean ± uncertainty.