specific charge is because a physical quantity can be complete only when by giving magnitude only. Here the physical quantity is complete by its magnitude.
vector
Since you can represent that with a single number, it isn't a vector - just a scalar.
Length is a scalar quantity. By definition, a vector quantity has both magnitude (ie. length) and direction. Length does not have direction, so it is not a vector. Length is a scalar quantity. Length is a scalar quantity. yes
scalar
surface tension is a scalar quantity because it has no specific direction.
vector
Charge is a scalar quantity because it only has magnitude and no direction.
Since you can represent that with a single number, it isn't a vector - just a scalar.
A scalar times a vector is a vector.
Electric potential is a scalar quantity since work done and charge are scalars
vector
No, electrical charge is a vector quantity because it has both magnitude and direction.
Length is a scalar quantity. By definition, a vector quantity has both magnitude (ie. length) and direction. Length does not have direction, so it is not a vector. Length is a scalar quantity. Length is a scalar quantity. yes
Yes, you can add a scalar to a vector by adding the scalar value to each component of the vector.
Average speed is a scalar quantity because it only has magnitude and does not have a specific direction associated with it.
A vector has direction, where as a scalar does not. When you add two vectors, it is like you are moving one vector to the end of the other vector, and closing off the triangle with a vector for the third side. That third vector is the addition of the first two vectors. The new vector points in a specific direction, so it cannot be a scalar.
Vector quantities have both magnitude and direction, such as velocity and force. Scalar quantities have only magnitude and no specific direction, such as speed and temperature.