# Worksheet: SI Unit Multiples and Submultiples

Q1:

A person in good physical condition can provide W of useful electrical power by doing mechanical work, neglecting any problems of generator efficiency and practical considerations such as resting time.

How many people would it take to run a 4.00-kW electric clothes dryer?

How many people would it take to replace a large electric power plant that generates 800 MW?

• A
• B
• C
• D
• E

Q2:

A device called an insolation meter is used to measure the intensity of sunlight. It has an area of 100 cm2 and registers 6.50 W. What is the intensity in W/m2?

Q3:

The density of gold is 19.3 g/cm3. What is the density in kilograms per cubic meter?

Q4:

The density of nuclear matter is about kg/m3. Given that 1 mL is equal in volume to 1 cm3, what is the density of nuclear matter in Mg/µL?

Prefix Symbol Meaning Prefix Symbol Meaning
yotta- Y 1024 yocto- y 10−24
zetta- Z 1021 zepto- z 10−21
exa- E 1018 atto- a 10−18
peta- P 1015 femto- f 10−15
tera- T 1012 pico- p 10−12
giga- G 109 nano- n 10−9
mega- M 106 micro- μ 10−6
kilo- k 103 milli- m 10−3
hecto- h 102 centi- c 10−2
deka- da 101 deci- d 10−1
• A Mg/µL
• B Mg/µL
• C Mg/µL
• D Mg/µL
• E Mg/µL

Q5:

Mars has a mass of kg and has a volume of km3.

Calculate the density of Mars in kg/m3.

• A kg/m3
• B kg/m3
• C kg/m3
• D kg/m3
• E kg/m3

Calculate the diameter of Mars in km.

Q6:

Intensities to which the ear can respond, from the threshold of hearing to the intensity which causes damage after even brief exposure, differ by a factor of . If you could measure distances over the same range of values with a single instrument and the smallest distance that the instrument could measure was 1 mm, what would be the largest distance that the instrument could measure?

• A 1 km
• B 10 m
• C km
• D km
• E km

Q7:

For an series circuit, , , and .

If an ac source of variable frequency is connected to the circuit, at what frequency is maximum power dissipated in the resistor?

What is the quality factor of the circuit?

Q8:

What is the area of a circle 3.102 cm in diameter?

Q9:

Restate the mass kg using a metric prefix such that the resulting numerical value is greater than one but less than 1 000.

Q10:

What is the volume of Jupiter in cubic km3? Use a value of m3 for the volume of Jupiter.

• A km3
• B km3
• C km3
• D km3
• E km3