Physics Unit One Practice

What is the SI unit for measuring time?

• seconds

• hours

• meters

• lightyear

What is the SI unit for measuring mass?

• grams

• kilograms

• pounds

• ounces

What is the SI for measuring length?

• kilometers

• meters

• miles

• feet

A bicycle has a speed of 6 m/s. What is its speed in km/h?  (1 km=1000 m)

• 21.6 km/h

• 16.67 km/h

• 2.16 km/h

• 1.67 km/h

How many significant figures does the following number have: 0.002040

• 6

• 4

• 3

• 2

Round 0.010229 to four sig figs

• 1022

• 1023

• 0.01023

• 0.01022

Round 1047.78 to three sig figs

• 104

• 105

• 1050

• 1050.00

What is 78.5 rounded to one significant figure?

• 79

• 78.5

• 70

• 80

Determine the number of Significant Figures in 10.0-g

• 5

• 4

• 3

• 2

Which of the following is the answer for the problem with the correct number of significant digits?
24.32 + 1.2 = 25.52

• 25.6

• 25.52

• 25.5

• 25