Define Scalar, Vector, Tensor with examples

 Scalar:

• A scalar is a single value or a number that is used to describe the magnitude of a physical quantity, such as temperature, pressure, or mass.
• Example: 5 meters, 10 N (Newtons), 20°C (degrees Celsius)

Vector:

• A vector is a mathematical object that has both magnitude and direction.
• Example: velocity, force, displacement
  

Tensor:

• A tensor is a multi-dimensional array of numerical values that can be used to describe physical quantities that have more than one direction.
• Example: stress, strain, pressure.