Practice problems of the unit conversion - page 14 of 112
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: 2238
- Curtains 5085
Daddy has to hang 3 meters of curtains. He needs one lock at 10 cm. How many locks will he need for a 3m curtain? - Hammerhead 5061
The hammerhead weighs 1 kg and the handle 250 g. What is the weight ratio of these two parts of the hammer? - Express 4659
Express the ratio in the basic form. a) 1cm: 1m b) 3 ha: 30 a c) 50 kg: 1 t d) 2.5 m: 10 cm - Distance 4268
The map's scale is 1:10000. What is the actual distance of 4cm on the map?
- Preparation 3992
4 per mille of active ingredient is needed per 6 liters of water to prepare sprays. How many milliliters of active substance do we add to the sprays? - Apples 3424
57 kg of 3q red apples is dried. How many dried apples do we get from 60 kg of fresh apples? - I visited
I visited my grandmother over the weekend. On Saturday, I arrived at her house or 10:35:02. I left on Sunday at 12:45:00. How long was my visit to my grandmother? - A book 3
A book that is printed on both sides has 36 pages. If the book is 3/8 cm thick, determine the thickness of one page in cm. - How far 2
How far can a subway car travel in 1 hour if its average speed is 0.96 miles per minute?
- The distance
The distance between two towns on a given map is 3 ½ cm. If ½ cm represents 6 km, what is the distance between the two towns? - A family
A family of four consumes 220 liters of water a day. How many hectoliters of water are consumed by 68 tenants per day? - Mains voltage
How much electric current flows through the appliance with a resistance of 40kΩ, connected to the mains voltage (230 V)? - Cyclist 12
What is the average cycle speed traveling at 20 km in 60 minutes in km/h? - A filter
It is a pool with a volume of 3500 liters. The filter filters at 4m cubics per hour. How many minutes would it filter the entire pool?
- The train
The train passed the observer in the 20s and passed through a 1500m tunnel in 2 minutes. Calculate the speed (km/h) and train length. - Train and walker
Walker passes an hour 5 km. Express train per hour 100 km. Walker went for 4 hours. How many minutes did the distance express train? - Copper density
The copper roller weighs 547.4 g. determine its volume. Use copper density is ρ = 8960 kg/m³. - One deci
Wine 0,375 l costs 2040 CZK. How much does one dl cost? - Time adding
Add and write the result again as hours, minutes, and seconds: 2hodiny45min15s + 1h20m50s =
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