Unit: Significant Figures and Unit Conversions End of the unit quiz for physics students. I teach and insist on using dimensional analysis for unit conversions even when my students complain that it is too much work. You'll thank me later... :)

1. Quiz
Name:___________________________ Date:_______________
Complete the table below:
Number Significant figures Scientific notation
239.127
0.0005120
970000 2
7.50 x 10-3
6.5 x 105
Do the following calculations and round off to the propernumber of
significant figures. Rememberto include the properunits.
1. 0.0004563g ÷ 2.315432mL=
2. 2.05 cm x 15.0 cm =
3. 300. m ÷ 3600 sec =
4. (125.626 g + 33.35 g) ÷ 22.6 mL =
5. 23.903 m - 24.1 m =
Complete the conversions (show your work!):

2. 1 mile = 1.6 km
1 inch = 2.54 cm
Use your reference tables to find the rest of conversion factors.
Convert 60 mph to km/h → _______________km/h
Convert 35.7 cm/min to m/sec→ ________m/sec
Convert 40 mph to inches/sec → ________in/sec
Convert 40 inches/min to mph→ ________mph