Flashcards: Fundamentals of Physical Quantities and Measurements — 14 cards

Measurable quantity — definition?

A physical property that can be measured or calculated.

Measurement instrument — role?

Device used to determine the value of a physical quantity.

SI units — purpose?

Standardized units for consistent measurement worldwide.

Symbol — example?

Letter representing a physical quantity, e.g., m for mass.

Mathematical relationship — function?

Expresses how quantities are related mathematically.

Physical quantity — example?

Mass, length, time, temperature, power, frequency.

Electrical quantity — example?

Charge, current, voltage, resistance, power.

Power — SI unit?

Watt (W), rate of energy transfer.

Frequency — SI unit?

Hertz (Hz), cycles per second.

Relation between power and frequency?

Power can depend on frequency in wave systems.

Measurable quantities — key point?

Expressed with units and symbols for clarity.

Measurement instruments — example?

Balance, thermometer, oscilloscope.

SI units — base units?

Kilogram, meter, second, ampere, kelvin, mole, candela.

Physical quantities — measurement?

Measured directly or calculated via formulas.