# Lesson Worksheet: Representing Small Values of Physical Quantities Physics • 9th Grade

In this worksheet, we will practice using scientific notation and unit prefixes to multiply and divide values of physical quantities by various powers of ten.

Q1:

A bullet comes to rest in a time of s. What is the time taken for the bullet to come to rest, expressed in decimal form?

Q2:

Which of the following is equal to one nanowatt when multiplied by one watt?

• A
• B
• C
• D
• E

Q3:

A piece of dust has a mass of 0.0065 g. What is the mass of the piece of dust expressed in scientific notation to one decimal place?

• A g
• B g
• C g
• D g
• E g

Q4:

Calculate the volume of a ball of radius 1.2 cm. The volume of the ball is given by , where is the radius of the ball.

• A m3
• B7.2 m3
• C m3
• D1.7 m3

Q5:

A rectangle has side lengths of 0.02 m and 0.004 m. Calculate the area of the rectangle.

• A80 μm2
• B8 μm2
• C80 nm2
• D8 nm2

Q6:

What is the value of 1 centimetre in units of micrometres?

• A μm
• B μm
• C μm
• D μm

Q7:

What is 6 m3 in litres?

• A60 litres
• B600 litres
• C6 litres
• D6‎ ‎000 litres

Q8:

If and , calculate the value of .

• A0.283 s
• B0.1327 s
• C0.2713 s
• D0.4 s

Q9:

Which of the following represents the smallest value of voltage?

• AMicrovolt
• BPicovolt
• CMillivolt
• DNanovolt

Q10:

Which of the following is the smallest quantity of mass?

• A0.043 mg
• B0.043 g
• C430 µg
• D0.00043 kg