Physics Math Review

A virus is viewed under a microscope. Its diameter is 0.0000002 meter. How would this length be expressed in scientific notation?

• 2 x 10^-7 m

• 2 x 10^-6 m

• 2 x 10⁶ m

• 2 x 10⁷ m

What is the measurement 0.000058 kg written in scientific notation?

• 5.8 x 10^-6 kg

• 5.8 x 10^-5 kg

• 5.8 x 10⁵ kg

• 5.8 x 10⁶ kg

What is the measurement 6.92 x 10^-3 meters written in standard form?

• 0.000692 m

• 0.00692 m

• 0.0692 m

• 0.692 m

Write the measurement 6.37x 10^-2 cg in standard form.

• 0.00637 cg

• 0.0637 cg

• 637 cg

• 63700 cg

A typical ruby throated hummingbird is 8 centimeters long. Express its length in millimeters and dekameters.

• 80 mm; 0.008 dam

• 80 mm; 0.8 dam

• 800 mm; 0.8 dam

• 800 mm; 0.008 dam

Jane has a mass of 50. kilograms. Express her mass in grams and in pounds. (1 kg = 2.2 lbs.)

• 50,000 g; 23 lbs.

• 500,000 g; 110 lbs.

• 500,000 g; 23 lbs.

• 50,000 g; 110 lbs.

In solving a physics problem, you end up with m in the numerator and m/s in the denominator. The units for your answer are:

• m²

• m²/s

• s

• m

If you are measuring the length of a room, the most appropriate SI unit is the:

• meter

• kilometer

• centimeter

• millimeter

If you are measuring the thickness of a strand of human hair, the most appropriate SI unit is the:

• kilometer

• millimeter

• meter

• micrometer

How many significant figures are in the measurement 0.0054 cm?

• 5

• 4

• 3

• 2