Physics Practice Quiz 1-2

The measurement 405,000 mg has how many significant digits?

• 6

• 5

• 4

• 3

The measurement 0.00008770 km has how many significant digits?

• 8

• 4

• 3

• 7

The measurement 10.0 g has how many significant digits?

• 1

• 2

• 3

• 4

Which of the following measurements have 4 significant digits?

(Select all that apply.)

• 1010 km

• 0.0055 km

• 5000 km

• 101.0 km

• 1.200 x 10³ km

The correct scientific notation for 67,400,000 is _________.

• 6.74 x 10⁷

• 67.4 x 10⁶

• 6.74 x 10^-7

• 674 x 10⁵

The correct expanded form of 3.4 x 10⁴ is _________.

• 0.00034

• 340

• 3400

• 34,000

What is the measurement 12,050 kg rounded off to three significant figures?

• 12,000 kg

• 12,050 kg

• 12,100 kg

• none of these

Perform the following calculation and round off to the correct number of significant digits: 6.201 cm + 7.4 cm + 0.68 cm + 12.0 cm

• 26.281 cm

• 26.28 cm

• 26.2 cm

• 26.3 cm

Perform the following calculation and round off to the correct number of significant digits: 1.31 cm x 2.3 cm

• 3.013 cm²

• 3.01 cm²

• 3.02 cm²

• 3.0 cm²

Perform the following calculation and round off to the correct number of significant digits: (20.7 cm + 28 cm) ÷ 7.41 s

• 6.57 cm/s

• 6.61 cm/s

• 6.6 cm/s

• 6.5 cm/s