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Q. 4.1 State, for each of the following physical quantities, if it is a scalar or a vector: volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity
Answers (1)
Volume is a scalar quantity since it has only magnitude without any direction.
Mass is a scalar quantity because it is specified only by magnitude.
Speed is specified only by its magnitude not by its direction so it is a scalar quantity.
Acceleration is a vector quantity as it has both magnitude and direction associated.
Density is a scalar quantity as it is specified only by its magnitude.
The number of moles is a scalar quantity as it is specified only by its magnitude.
Velocity is a vector quantity as it has both magnitude and direction.
Angular frequency is a scalar quantity as it is specified only by its magnitude.
Displacement is a vector quantity since it has both magnitude and associated direction.
Angular velocity is a vector quantity as it has both magnitude and direction.
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