What is Scalar? What is Vector?

A vector is a quantity that has both magnitude and direction, also known as a vector. Some physical quantities only have numerical magnitude and no direction, and some of them have positive and negative points.

1. Scalar quantities are also known as "vectorless quantities". Some physical quantities only have numerical magnitude and no direction, and some of them have positive and negative points. Operations between these quantities follow general algebraic laws. In layman's terms, a scalar quantity is a quantity that has only a magnitude and no direction.

2. A vector is a quantity that has both magnitude and direction, also known as a vector. Generally speaking, they are called vector quantities in physics, such as velocity, acceleration, force, and so on. Abandon the practical meaning, and abstract it into a mathematical concept vector.

In computers, vector graphics can be infinitely enlarged and never deformed.

3. The vector expression of physical laws has nothing to do with the choice of coordinates, and vector symbols provide a simple and clear form for the expression of physical laws, and simplify the derivation of these laws, so vectors are useful tools for learning physics.

A vector is a quantity with magnitude and direction.

For example: displacement (10 meters to the east).

Whereas, scalars only have magnitude and no direction.

Such as: mass (10 kg).

Vector is also known as "vector". Some physical quantities, which can only be completely determined by the magnitude and direction of the values, do not follow the general algebraic laws of operation between these quantities, and they follow the geometric rules of operation when adding and subtracting. Such quantities are called "physical vectors".

Such as velocity, acceleration, displacement, force, impulse, momentum, electric field strength, magnetic field strength, ......and so on are vectors. Vectors can be represented in bold font (e.g., f) or letters with arrows.

Scalar] is also known as "vectorless". Some physical quantities have only numerical magnitude and no direction. Operations between these quantities follow general algebraic laws.

Such quantities are called "scalars". Such as mass, density, temperature, work, energy, distance, rate, volume, time, heat, resistance and other physical quantities. Regardless of the coordinate system chosen, the value of the scalar remains constant.

The product of the vector and scalar is still a vector. The product of the vector and the vector can form a new scalar or a new vector, and the product of the scalar is called the scalar product; The product that makes up the vector is called the vector product. The calculation of work, power, etc., is based on the scalar product of two vectors.

Vectors: There are magnitudes and directions, such as: velocity, acceleration, displacement, force, electric field strength, etc.

Scalar: There are magnitude and no direction, for example: mass, density, temperature, work, energy, distance, rate, volume, time, heat, resistance, etc.

Vectors that have sizes and directions; There are only sizes, and those without direction are scalars.

For example, velocity, acceleration, are vectors; Temperature, pressure are both scalar quantities.

What I said upstairs makes sense, simply put, it is the two quantities we encounter in mathematics and physics, and they have different methods for calculating, we call the quantities that can be directly added or subtracted as scalar quantities, such as temperature, to say that today's temperature is 2 degrees higher than tomorrow, you just need to directly add today's temperature to 2 to get tomorrow's temperature. However, this is not the case with many numbers in nature, such as physical mechanics, and the problem of direction must be taken into account. It is calculated in the way of parallelogram or triangle, a bit of a multiplication, and the operation of vector is not necessarily based on the quadrilateral or triangle, it can also include other such as difference multiplication, which is used in the calculation of moments in physics.

Therefore, we call quantities that can be directly added and subtracted as scalar quantities, and quantities that are not scalar quantities are called vectors (they seem to have directions).

Vectors have both magnitude and direction, such as: force, velocity, displacement, etc., these are vectors.

Scalar quantities only have magnitude and no direction, such as: time, distance, mass, etc., these are scalar quantities.

Difference Between Vector and Scalar.

1).Vectors have magnitude and direction, while scalars only have magnitude and no direction

2).Vector operations conform to the parallelogram rule. Scalar numbers are directly added and subtracted

The difference between vector and scalar is that vectors have directions and scalars have no directions, so are all physical quantities with directions vectors Physical quantities with directions are not necessarily vectors, such as current intensity, electromotive force, moment, etc. Physical quantities such as force, velocity, displacement, acceleration, etc., not only have directions, but also follow the parallelogram law when synthesized and decomposed, then these quantities are vector quantities. And although the current intensity, electromotive force, moment, etc., have directions, they do not have to follow the parallelogram rule in the process of operation, as long as they do algebra and operation, so they are not vectors.

The correct explanation should be: a physical quantity that has a direction and follows the parallelogram rule in operation is called a vector, 10,