Practice problems of the unit conversion - page 19 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
- Identical 3518
The carpenter cut two identical pieces into shelves from a 2-meter longboard. He cut the rest into four side shelves of 20 cm. How long are the shelves? - Three-hectolitre 3136
Workers rolled the oil into 115 two-liter and three-liter cans from a full three-hectolitre barrel. How many cans were there? - Ava filled
Ava filled 3 cups with different amounts of water. The amounts were 225 ml, 370 ml, and 435 ml of water. Which of the following is the total amount of water, in liters, that Ava used to fill the 3 cups? - Mallet
Who has the longest mallet if Janko's is 1,205 m long, Jurko's is 124 cm long, and Ferko's 1245 mm long?
- Each of
Each of Suzan's notebooks is 4/5 inches wide. How many notebooks will fit if she has 25 inches of space remaining on her bookshelf? - Two cities
On a map, 1.5 cm represents 50 miles. If the distance between the two cities on the map is 6 cm, how many miles separate the towns? - Deceleration
In a braking test, a vehicle that travels at 51 km/h stops in 5 s. What is its acceleration? - A section
A section of the boardwalk is made of 15 boards. Each board is 9 1/4 inches wide. The total width of the boardwalk is 144 inches. The spacing between each board is equal. What is the width of the spacing between the boards? - Empty barrel
In the backyard is an empty barrel with a volume of 2 hl. How many liters are missing at the edge when 53 liters flowed into it for one day and 68 liters of water for two days?
- Motorcycle engine
The motorcycle engine has a constant power of 1.2 kW for 0.5 hours. How much work does the engine do? Express work in kWh and Ws units. - Three pumps together
One pump fills the tank in 1.5 hours, the second in 2 hours, and the third in 3 hours 20 minutes. How many minutes will the tank fill with three pumps if they work simultaneously? - Summerjob
Temporary workers Franta ties a sheaf of hay in 20 minutes, Lojza only a quarter in the same time. How many sheaves do they tie together in 8 hours? - Pencil cut
Veronica cut a 10cm pencil. Each turn, the pencil was reduced by 0.2mm. She turned the pencil 100 times. How many centimeters has a pencil now? - Gasoline
How many liters of gas is in the tank if its weight is 15.4kg? The specific density of gasoline is 770kg/m³.
- Passenger car
A passenger car covers 1 km in 2/3 minutes, and a truck in 50 seconds longer. How much slower is the speed of the truck? - Decimetres 82870
Next to the road are 15 pillars at a distance of 2.5 meters. The pillars are 15 cm wide and stand at the beginning and end of the path. Calculate the length of the path in decimetres. - Minutes 82607
A) how many kg is 4/5 tons more than 7/10 tons? b) by how many minutes is 1/3 of an hour less than 5/6 of an hour? - Buckets 71944
The bucket is filled with one tap in 4 minutes and the other in 3 minutes. In how many hours will five buckets be filled with both cocks? - Measuring 67014
Gold's density is 19200kg/m³. How much does a gold bar weigh 25cm, 8cm, and 37mm?
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