Practice problems of the unit conversion
The International System of Units (SI) is the standard system of units used in most countries around the world. It is based on seven base units: the meter for length, the kilogram for mass, the second for time, the ampere for electric current, the kelvin for temperature, the mole for amount of substance, and the candela for luminous intensity. These units can be converted to other units using conversion factors, such as the relationship between meters and centimeters (1 meter = 100 centimeters). Other common SI unit conversions include:1 liter = 1000 milliliters
1 gram = 1000 milligrams
1 joule = 1 watt-second
1 newton = 1 kilogram-meter per second squared
In the SI system, units can be multiplied or divided by powers of ten to create larger or smaller units. These multiples are called prefixes. The most common prefixes and their meanings are:
mega- (M) = 1,000,000 (e.g. 1 megahertz = 1,000,000 hertz)
kilo- (k) = 1000 (e.g. 1 kilogram = 1000 grams)
centi- (c) = 0.01 (e.g. 1 centimeter = 0.01 meters)
milli- (m) = 0.001 (e.g. 1 milliliter = 0.001 liters)
micro- (µ) = 0.000001 (e.g. 1 microgram = 0.000001 grams)
nano- (n) = 0.000000001 (e.g. 1 nanosecond = 0.000000001 seconds)
It is important to note that, when using these prefixes, the prefix should be written before the unit symbol.
Number of problems found: 2254
- Speed problem
Convert 540 meters/minute to Kilometer/hour. - Half-hour
How many minutes are in 1/2h (in a half hour)? - Zahra
Zahra poured 2 liters of milk into a mixing bowl. How many milliliters of milk did she pour? - Glass cleaner
A 2-pint bottle of glass cleaner costs $13.44. What is the price per fluid ounce?
- There 32
There are 20 magazines in a pile. Each magazine is 5 mm thick. How high is the pile in meters? - Write a blog
You spend 2 1/2 hours online. You spend 1/5 of that time writing a blog. How long do you spend writing that blog? - A road
A road on a map measures 8cm long. The scale of the map is 25000. Calculate the actual length of the road - The corn
When the corn was ready for harvest 75 days later, it measured 2 ¼ meters high. What is the measurement in centimeters? - Fahrenheit 2
Fahrenheit temperature is found by dividing the degree Celsius by 5/9 and then adding 32 to the quotient. Find the Fahrenheit temperature if the degree of Celsius is 40.
- The bicycle
The bicycle runs 30 mph for 20 minutes. How far it goes? - Map scale
On a map, on a scale of 1:50000, what is the distance in kilometers that 6 cm on the map represents? - Maria 6
Maria drank 3 liters of water last week. Her friend drank twice as much water as Maria. How many milliliters of water did they both drink? - The playhouse
The drawings of the playhouse are made on a scale of 1:50. In the drawing, the length of the cottage is 4.5 cm. How long is the playhouse actually? - Saw a board
A board of 16 3-fourths inches is cut from a board that is 3 feet long. If the width of the saw cut is one-eighth inch, what is the length of the remaining piece?
- Martha 3
Martha placed 225 liters of water into a child swimming pool that holds 3.8 hectoliters. How much more water does Martha need to fill the pool? - Nautical vs statue mile
A nautical mile is the unit of length used in sea and air navigation. A nautical mile is equal to 6,076 feet. What percent of a statue mile (5,280 ft) is a nautical mile? - Salt water
The ratio of water (in liters) to salt (in grams) needs to be 3 to 2. If we add 10 grams of salt, how much water do we need to add? - Workers
Suppose John starts work at 8:45 AM and finishes at 5:15 PM. He has 90 minutes of breaks. How many hours does he work in 5 days? - A ship 2
A ship runs at 15 1/2 knots (pls convert to nautical miles per hour) for 3 1/2 hours. How far does the ship travel?
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