Practice problems of the unit conversion - page 9 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
- 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? - Travel 4858
How long will a 1 km long tunnel take to travel at a speed of 100 km per hour? - Time
Write time in minutes rounded to one decimal place: 3 h 48 m 45 s. - Wire cut 2
We can cut a length of wire into five pieces, each 24 cm long. How many pieces, each 15 cm long, can be cut from the wire?
- Frequency of oscillation
A weight of 1 kg was suspended from the spring, and the spring was extended by 1.5 cm. Determine the frequency of the natural oscillation of the resulting oscillator. - Coke and coal
20.1 tons of coke is produced from 30 tons of black coal. How much coke is made from 1 kilogram of coal? - Two dogs
Izzy's dog is 10 1/2 years old. Paige's dog is 18 months old. How many years older is Izzy's dog? - Bucket
How many 5-liter buckets do you have to pour into a 0.2 m³ container to make it full? - Bulb
A 60 W bulb consumes 0.12 kWh of electricity. How long did she stand light without a break?
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