Practice problems of the unit conversion - page 15 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
- Five-kilogram 4112
Fertilizer for gardeners contains the following trace elements: bor. ... ..minimum 0.3promile weight. What is the smallest weight of each trace element in a five-kilogram fertilizer package? - Percentage 3549
Fresh weighs 8 kg. After drying, their weight was 96 dag. What percentage of water do fresh mushrooms contain? - Measures 3499
What is the actual length of the road, which measures 5 cm on the map, if the scale is: a / 1:500, b / 1:1,000 c / 1:1,000,000? - Millimeters - saw
A fine tooth of a saw has 60 teeth per 2 inches (1 inch = 2.54 cm). What is the tooth pitch in millimeters (rounded to hundredths of mm)? - Salt water
The ratio of water (in liters) to salt (in grams) needs to be 3 to 2. If we add 10 grams of salt, how much water do we need to add? - Current in the conductor
Calculate the current in the conductor (in mA) if it is connected to a 4.5 V voltage source and its resistance is 20 (ohm). - Weight
The kilogram weight has a volume of 116 ml. From which material is it probably made? Use substance density tables, e. G. mathematical-physical-chemical tables. - Cooker
A current of 2A passes through the immersion cooker at a voltage of 230V. What work do the electric field forces do in 2 minutes? - Scale of the map
The distance between the two cities is actually 30 km, and the map is 6 cm. What is the scale of the map? - Salad
We need two-tenths kg of a carrot, one-tenth of peas, and three-tenths tomatoes to make a salad. Express the fraction of the weight of the vegetables to be salad. Convert the result to grams. - Resistance
Determine the bulb's resistance with the current 200 mA and is in a regular lamp (230V). - Small city
The length of the street is 230 m. What will its image length be on the plan at a scale of 1:2500? - Blueberries
Adéla sells blueberries for 50 CZK/1 l, and Zdeněk sells 1 kg of blueberries for 75 CZK. Which of them sells irritants if 1 liter of blueberries weighs 650 g? - Two monuments
The distance between two historical monuments on a map with a scale of 1:500000 is 48 mm. Find the actual distance between these monuments in km. - Steps
Peter makes steps long 70 cm, John 45 cm long. After how many meters do their footsteps meet? - Rope
Peter has a long rope of 2 4/5 meters. Martin has a rope 20 cm longer. What length of ropes is achieved if the boys link ropes? - Drunk man
The drunk man has 2.6‰ of alcohol in his blood. How many grams of alcohol has in his blood if he has 5 kg of blood? - Statuette 83001
The bronze figurine weighs 0.5 kg. Bronze is an alloy of tin and copper in a ratio of 1:4. How many grams of copper and how many grams of tin does the statuette contain? - Calculate 80367
Juraj is 173 cm tall, and his younger brother Filip is three times shorter. Calculate Philip's height in meters. - Minutes 80094
Five hundred liters of water will flow into the pool in 5 minutes, and 120 liters of water will flow out of it in 12 minutes. How many liters of water will be added in 1 hour?
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