Understanding Base and Derived Quantities

What are base physical quantities?

• Length, mass, time, electric current, temperature, amount of substance, luminous intensity.

• Frequency, power, area

• Speed, volume, pressure

• Density, energy, force

List three examples of base physical quantities.

• Length, Mass, Time

• Volume

• Temperature

• Force

What are derived physical quantities?

• Derived physical quantities are always measured directly.

• Derived physical quantities are quantities obtained from fundamental quantities through mathematical operations.

• Fundamental quantities are the only types of physical quantities.

• Derived physical quantities cannot be expressed mathematically.

which pair is an example of derived physical quantities.

• Velocity, Force

• Distance, Time

• Temperature, Pressure

• Mass, Energy

How are derived quantities formed from base quantities?

• Derived quantities are formed by mathematical operations on base quantities.

• Derived quantities cannot be expressed in terms of base quantities.

• Derived quantities are always equal to base quantities.

• Derived quantities are formed by direct measurement of physical properties.

What is the significance of the International System of Units (SI)?

• It serves as a historical reference for ancient measurement systems.

• It is primarily used for artistic purposes in design.

• It is a guideline for creating fictional measurement units.

• The significance of the International System of Units (SI) lies in its role as a universal standard for measurement, promoting consistency and clarity across various fields.

List the seven base units of the SI system.

• inch, ounce, day, ohm, celsius, decibel, newton

• liter, gram, hour, volt, joule, pascal, hertz

• meter, pound, minute, coulomb, rankine, liter, lumen

• meter, kilogram, second, ampere, kelvin, mole, candela

What is the symbol for the unit of length in SI?

• cm

• km

• mm

• m

What physical quantity does the unit 'kilogram' represent?

• Weight

• Volume

• Length

• Mass

What is the symbol for the unit of time in SI?

• hr

• day

• min

• s