Practice problems of the unit conversion - page 6 of 111
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: 2215
- A bag 3
A bag of rice weighs 5.4 kg, and a bag of flour weighs 3678 g. By how much is one bag heavier than the other? - Newton law
At what acceleration moves a train with a weight of 800 t start if the traction force of the locomotive is 2 * 105 N? - Licorice
A piece of licorice is 2/3 yards long. If it is cut into ten equal pieces, how long will each piece of licorice be? - Cutting wire
If you cut a 3 ½ ft length wire into pieces that are 2 inches long, how many pieces of wire will you have? - Quarter of an hour
If the clock showed a quarter of an hour more, it would be 10 minutes to 10 hours. How many hours do they show? - Permille of alcohol
I have 2 per mille of alcohol in my blood. How many milliliters is it when I have 5 liters of blood? - Kilometers
The scale of the map is 1:100,000. How long is the road, which is 4.7 cm long on the map, really long? - Feet to miles
A student runs 2640 feet. If the student runs an additional 7920 feet, how many total miles does the student run? - Water tank
In an empty fire tank, 2150 hl of water jetted in 5 hours. How many hectoliters of water were jetted every hour? How many hectoliters of water were in the tank after three hours? - Resistance of the resistor
The resistor terminals have a voltage of 20 V, and a current of 5 mA is passed through. What is the resistance of the resistor? - Map scale
What is the map's scale if 5.4 km is 72 mm on the map? - Lunch
Jane eats the whole lunch for 30 minutes. Which part of the lunch does he eat in 180 seconds? - Density - simple example
Material of density of 1189 kg/m³ occupies a container volume of 64 cm³. What is its mass? - Subway 82864
Write which part of the subway is: a) 1 mm b) 5 cm c) 38 mm d) 230 cm - Centi-year 73254
How many minutes is the centi-year longer / shorter than a deca-month? The year is 365 days, and the month is 30 days. - Fraction 26291
Write the per mille as a fraction Seven ‰ 25 ‰ 15 ‰ 10 ‰ 2.5 ‰ 1.7 ‰ 0.8 ‰ 2 ‰ - Minutes 19183
A worker loads sand into a car in 5 hours. How many minutes will this carload a loader 120 times faster than a worker? - Cheese 9051
20 dkg of cheese costs 40 CZK. How much does 1 kg of cheese cost? - Circumference 9021
How often do you have to go around the house with a circumference of 50 m to run 2 km? - Minutes 5485
When it flies 106 km in 30 minutes, at what speed does the plane fly?
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