Scientists use all sorts of units of measurements to get values and quantities. Some of these are called basic quantities and some of them are called derived values. What is the difference between the two different kinds of measurements?
basic quantities are the base units in a given measurement system. They can also be directly measured.
These types of values have something in shared. They can all be directly measured.
1. Distance. How far did you travel? One thousand meters.
2. Time. How long did it take to travel here? 3,600 seconds.
3. quantity. How much milk is in the jug? One liter.
4. Temperature. The temperature at which atoms cease to move is 0 Kelvins. Temperature can be measured in degrees above Kelvin. The temperature outside, on a cold day, might be 273.15 Kelvin.
While basic quantities can be directly measured, derived ones must be calculated. They are calculated from the base unit. That’s the biggest difference. Examples of derived quantities include:
1. Speed. You might be able to see your speed on the speedometer on your car, but it is a derived value. Speed is calculated by dividing total distance traveled by the time it took to travel it. So, if you traveled 100 miles in two hours, your rate, or your speed, was 50 miles per hour. If you traveled 150 kilometers in 3 hours, then your speed was 50 kilometers per hour.
2. Celsius and Fahrenheit. Zero degrees Celsius is 273.15 Kelvin. Zero degrees Fahrenheit is 255.37 Kelvin. Kelvin is the base unit in the SI system. However, it is much easier to measure Celsius and Fahrenheit, but they are nevertheless considered to be derived.
3. Watts. That is a 100 Watt light bulb. What does that average? Watts are strength, otherwise known as radiant flux. It’s the amount of all the light including infrared, ultraviolet, and visible. Watts are calculated by dividing the Joules by seconds, so a Watt is a J/s.
4. Joules. Joules are also a derived quantity and a Joule is the amount of energy it takes to cause 1 Newton of force for one meter. Joules are an amount of energy. Another unit for measuring energy, more shared in the non-scientific world, is the calorie. A calorie is the amount of energy required to raise the temperature of one milliliter of water one degree Celsius at standard temperature and pressure. The calories listed on the back of food packages are truly Kilo-calories.
5. Newton. A newton is also a derived value. A newton is the net force required to accelerate one kilogram of matter one meter per second. Finally, a associate of basic quantities. A meter is the basic distance in the SI system, and a second is the base unit of time. A kilogram is nevertheless a derived quantity.
6. Kilogram. Mass, when measured in grams, is a basic quantity. Kilograms, however, are one thousand grams, so kilograms are derived.
When you’re working with the metric system, the basic unit is the base of the information. Grams are basic. Kilograms are derived. Meters are the base. Kilometers are derived. A liter is the base and a milliliter is derived. A derived number comes about by a calculation, already if it is as simple as multiplying something by 100.