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Exercises on unit conversions

Dr. Walt Volland revised September 19, 2011


Exercises on SI units and conversions
True / false

The meter is about the same length as the foot. FALSE

 

A kilogram is roughly the same weight as a liter of water.TRUE

 

The prefix milli- means multiply by 1/ 100. FALSE

 

The prefix centi- means multiply by 1000. FALSE

 

The volume 43 milliliters = 0.043 liters. TRUE

 

The length 3.45 meters is the same as 34.5 centimeters. FALSE

 

The size of the Kelvin and Celsius degrees are the same. TRUE

 

The SI unit kilogram measures mass. TRUE

 

The length base SI unit is the meter. TRUE

 

The prefix milli- is smaller than the prefix kilo-. TRUE

 

11. Why are time units the same in English and SI units?

There is no right or wrong answer to this. The day is the same length all over the world. The number of months are the same and commerce requires a common measure of time.

 

12. What is the prefix that matches the multiple 1,000,000.

a.
centi- this means 1/100 or one over one hundred
b.
kilo- this means one thousand 1000
c.
mega- means million
d.
milli- this means 1/1000 or one over a thousand

13. Which of the following is a derived unit?

a.
meter
b.
seconds
c.
kilogram
d.
meters / second this is a combination of two base units length and time

14. Which of the following is the multiple that matches the prefix nano-?

a.
0.001
b.
1/ 100
c.
1,000,000,000
d.
1 / 1,000,000,000 means one billionth or nano-

15. The mass 223 grams is the same as

a.
223 g x ( 1 kg / 100 g)
b.
223 g x ( 1 kg / 1000 g)Cancel "g" when multipling grams by ( kg / gram )
c.
223 g x (1000 g / 1 kg)
d.
223 g x ( 1 kg / 10 g)