Question

what are fundamental units in SI system ? name them along with their symbols.

Answer 1

The fundamental units in SI system are:

There are a total of 7 fundamental units in SI (International System of Units) system.

        Name  Symbol  Measure    Dimensional symbol

• second  s          time                                T
• metre m          length                                L
• kilogram kg           mass                               M
• ampere A          Electric current                 I
• kelvin K   Thermodynamic temperature   Θ
• mole mol       Amount of substance       N
• candela cd          Luminous intensity       J

Answer 2

There are 7 fundamental units in SI system discussed below.

Explanation:

• SI system comes from the French word Système international.

• It is the modern system of forming units.

• The SI system was prepared to reduce the confusion where different countries use different systems for their measurement.

• This leads to a calculation process and makes the system hectic.

• So 7 fundamental physical quantities were taken and they were to decide 7 units.

• These quantities were,

• 1. Length with unit meter.

• 2. Mass with unit kilogram.

• 3. Time with unit seconds.

• 4. Electric current with unit Ampere.

• 5. Thermodynamic temperature with unit Kelvin.

• 6. Amount of substance with unit mole.

• 7. Luminous intensity with unit Candela.

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Find the expression of universal gas constant R in SI System in terms of the the given properties of oxygen gas

Pressure= p (kPa)

Volume= V (ml)

Temperature= t (in kelvin)

Mass of oxygen= w (g)