Phy.

What is a physical quantity?

A physical quantity is a property of a physical system that can be measured and expressed in numbers.

What are examples of physical quantities?

Examples include length, mass, time, temperature, electric current, and volume.

How is length defined in the International System of Units (SI)?

Length is defined as the distance between two points, measured in meters (m).

What is the SI unit of mass?

The SI unit of mass is the kilogram (kg).

What does the term 'time' refer to in physics?

Time refers to the duration during which an event occurs, measured in seconds (s).

How is temperature measured?

Temperature is measured in degrees Celsius (°C) or Kelvin (K).

What is electric current?

Electric current is the flow of electric charge, measured in amperes (A).

What is the difference between a scalar and a vector quantity?

A scalar quantity has magnitude only, while a vector quantity has both magnitude and direction.

What unit is used to measure volume?

Volume is commonly measured in cubic meters (m³) or liters (L).

What is the significance of dimensional analysis in physics?

Dimensional analysis helps to check the consistency of equations and convert units.