A physical quantity that has magnitude only.
A physical quantity that has magnitude only is called a scalar quantity
A physical quantity that has magnitude only is called a scalar quantity. Scalar quantities are described by a magnitude or a numerical value, but they do not have a specific direction associated with them.
Examples of scalar quantities include length, mass, time, temperature, speed, volume, energy, and density. For instance, if we say that an object has a mass of 5 kilograms, this is a scalar quantity because it only provides information about the magnitude or value of the mass, without indicating any specific direction.
Scalar quantities can be added, subtracted, multiplied, or divided using regular arithmetic operations because they only have magnitudes. For example, if you have two objects with masses of 2 kilograms and 3 kilograms, their combined mass would be 5 kilograms (2 + 3). The operations involving scalar quantities do not consider any directional component.
It is important to distinguish scalar quantities from vector quantities. Vector quantities have both magnitude and direction. Velocity, displacement, force, acceleration, and momentum are examples of vector quantities. These quantities require both magnitude and direction to fully describe their physical meaning.
In summary, a physical quantity that has magnitude only is called a scalar quantity. Scalar quantities are described by their magnitude or numerical value, without any specific direction associated with them. Examples include length, mass, time, temperature, speed, volume, energy, and density.
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