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What is the same with the addition and subtraction of fractions?
1. The meaning of fractional addition is the same as that of integer addition, which is the operation of combining two numbers into one number. 2. The meaning of fractional subtraction is the same as that of integer subtraction, which is the operation of finding another addend by knowing the sum of two addends and one of them. 3. The checking method of fractional addition and subtraction is the same as that of integer addition and subtraction
Does the module of the position vector have a unit?
If so, what is it? Do the modules of other vectors have units?
The position vector has a unit, and the unit represents the direction
Modules have no units and are numerical values, such as | a | & # 178;
Scalar and vector of several units
Just tell me whether these units are vectors or scalars
: electric field strength e, electric potential energy EP, electric potential φ, electric potential difference u,
The electric potential energy EP, the electric potential φ and the potential difference u are scalars
The electric field strength e is a vector
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