Physical Quantities, units and measurement

What does a physical quantity consist of?

• numerical magnitude only

• direction and unit

• numerical magnitude and direction

• numerical magnitude and unit

Which is not an example of a derived quantity?

• area

• density

• speed

• time

What is the prefix for micro?

• M

• m

• μ

• n

Which pair of prefixes is larger than kilo?

• centi and milli

• nano and giga

• micro and deci

• mega and tera

Which option is in 4 s.f?

• 0.0023

• 0.0008

• 8.104

• 0.421

What is 0.042424 rounded to 3 s.f?

• 0.04

• 0.042

• 0.0424

• 0.04242

Which value is presented in the correct standard form?