Physics Measurement and Significant Figures Quiz

What is the purpose of a conversion factor?

• To decrease the measurement value

• To increase the measurement value

• To make units cancel

• To change the measurement system

How many significant figures are in the measurement 138.2 mm?

• 2

• 3

• 4

• 5

What is the result of adding 3.86 m and 2.4 m, rounded to the correct significant figures?

• 6.2 m

• 6.3 m

• 6.4 m

• 6.5 m

Which of the following is true about significant figures?

• All zeros are significant

• Only nonzero digits are significant

• All nonzero digits are significant

• The last digit is always significant

What does precision refer to in measurements?

• How close a measurement is to the true value

• The degree of exactness of a measurement

• The average of multiple measurements

• The range of possible values

What is the formula for converting 90 km/h to m/s?

• 90 km/h * 0.621371

• 90 km/h * 3600 s/h

• 90 km/h * 0.27778

• 90 km/h * 1000 m/km

What is the uncertainty in the measurement (14.6 ± 0.2) cm?

• 0.1 cm

• 0.2 cm

• 0.4 cm

• 0.3 cm

Which of the following is a source of error in measurement?

• Measuring in a straight line

• Writing down results

• Using a calculator

• Instrument malfunction

What is the result of dividing 409.2 kg by 11.4 L, rounded to the correct significant figures?

• 36.1 kg/L

• 36.0 kg/L

• 35.9 kg/L

• 35.8 kg/L

What is the smallest division of an instrument if the precision is 0.5 cm?

• 0.1 cm

• 0.05 cm

• 0.5 cm

• 1 cm