Physics

Volume

The amount of space occupied by an object or a substance.

Mass

The measure of the amount of matter in an object, typically measured in kilograms (kg).

States of Matter

The physical forms in which matter can exist, including solid, liquid, and gas, each with distinct properties.

Density

The mass of an object per unit volume, calculated as mass divided by volume.

Weight

The measurement of the force of gravity acting on an object, typically measured in Newtons (N).

Vectors

Quantities that have both magnitude and direction, such as force and displacement.

Scalars

Quantities that have only magnitude (size) and no direction, like time, temperature, and mass.

Moment of a Force

The measure of the turning effect of a force, calculated as force multiplied by the perpendicular distance from the pivot.

Principle of Moments

In equilibrium, the total anticlockwise moments equal the total clockwise moments, ensuring balance.

Pressure

The force exerted on a surface per unit area, measured in Pascals (Pa) or Newtons per square meter (N/m^2).

Order of size from smallest to largest in the whole universe

Moon-Planet-Sun-Solar System-Galaxy-Universe

light travels at a speed of

300 000 000 m/s