Practice problems of the unit conversion - page 22 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
- Electric charge
The electric current in a microprocessor circuit is 0.230 μA. How many coulombs pass a given point in the circuit in 1.50 ms? - Train
Find the average speed of a train (in km/h) that passes a telegraph pole in 7 seconds and passes a 378 m platform in 25 seconds. How long is the train? - Electric wire
William has a piece of wire that measures 1 yard long. He will use wire to fix several electrical outlets in his house. How many inches long is the wire? Solve this problem using bar diagrams. - Highway calculation
How many meters a car travels on the highway at a speed of 130 km/h per second (use a simple proportion).
- Video game
Nicole is playing a video game where each round lasts 7/12 an hour. She has scheduled 3 3/4 hours to play the game. How many rounds can Nicole play? - Jill's
Jill's mom stored some of the honey in a container containing 3/4 of a gallon. She used half of this amount to sweeten tea. How much was honey in the cups used in the tea? Express your answers in cups. - Freight train
Twenty-five identical freight wagons are connected behind the locomotive. The weight of the locomotive and all wagons is 1009000 kg. The locomotive weighs 84 tons. How many kilograms does one freight car weigh? - The appliance
The appliance has a power input of 2.3 kW. It is connected to the mains voltage of 230 V. What is the current flowing through the appliance? - Job task
After two hours and 40 minutes, the job is finished. Compared to last year, we were 40 minutes faster. What is the percentage increase in our performance?
- Average speed
When the bus stops at a bus stop driving average speed is 45 km/h. If it did not stop, it would drive at 54 km/h. How many minutes of every hour does it spend at stops? - Scale of map
James travels one kilometer in 12 minutes. The route was walked for half an hour, measured on the map 5 cm. Calculate how many kilometers James walked for half an hour. Find the scale of the map. - Wood
Wood contains 12% water. One m³ of wood weighs 650 kg. How many liters of water does it contain? - Produced 81413
A cube of sugar weighs 6 grams. How many sugar cubes are produced from one sugar beet that weighs 0.9 kg; if its sugar content is 18 percent? - Branisko 70954
The Branisko tunnel has a length of 4975m. How long will a car pass through the tunnel if the speed limit is 80km/h?
- Writing 67964
The typist typed 20 pages of text in 2 hours and 40 minutes. How many pages of text would she write at the same writing speed in 20 minutes? - One-sixth 46943
Peter planted 220 kilograms of potatoes, and he produced twelve times more. One-sixth of the proceeds were earmarked for next year. How many tons of potatoes to eat were harvested? - Constant 36313
The truck weighs 4.5 tons and is moving at a constant speed of 72 km/h. How big is his kinetic energy? - Reservoirs 29051
The three water reservoirs hold a total of 130 liters. Determine their volumes in m³. If the first fits 15 liters less than the second and 20 liters less than the third. - Obtained 26101
Bača obtained 2 kg of cheese from 20 liters of milk in the mountain hut. How many grams of cheese can it make from 15 liters of milk?
Do you have homework that you need help solving? Ask a question, and we will try to solve it.