Physics Math Essentials

Convert 230,000,000 mm to km.

• 2.3

• 23 km

• 230 km

• 2300 km

Convert 65 km/hr to m/s

• 3.9 m/s

• 18 m/s

• 230 m/s

• 410 m/s

Convert 230,000,000 to scientific notation

•  $2.3\times10^8$  

•  $23\times10^7$  

•  $2.3\times10^{-8}$  

• This number is already in scientific notation.

What is  $5.23\times10^{-4}$  in standard form?

• 0.00523

• 0.000523

• 5,230

• 52,300

How many significant figures in 23.05 m?

• 0

• 3

• 4

• N/A

How many significant figures in 0.000250 g

• 2

• 3

• 6

• 7

How many significant figures in 93,000,000 mi

• 2

• 3

• 5

• 8

How many significant figures in 99 red balloons?

• 1

• 2

• 99

• N/A