What are vectors and vectors?

Vector is also called vector, that is, the quantity with both size and direction is called vector. Vector is introduced into mathematics as the magnitude of force, velocity and acceleration
Vector and vector are a method or concept of vector (vector) analysis in mathematics. They are the same concept, but they are called differently. The simple definition refers to the quantity with both size and direction. In the electrical field, they are mainly used to analyze AC power, such as motor analysis, etc. The Application in frequency converter is based on the theory of motor analysis, which is called vector controlled frequency converter, The implementation method is not unique, but the mathematical model is basically consistent

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1. The definition of scalar and vector in Physics Please specify and list the related items. Thank you!
2. Given 2A + B = (- 4,3), a-2b = (3,4), find: (1) the coordinates of a and B; (2) | a + B | All letters are vectors
3. urgent It is known that the vertex of △ ABC is a (0,0) B (4,8) C (6, - 4) point m on the line AB, the tangent vector am = 3MB, the point P on the line AC, and the area of △ APM is the general of △ ABC. The coordinates of point P can be obtained
4. On the sides OA and ob of the triangle OAB, there are two points P and Q respectively. It is known that OP: PA = 1:2, OQ: QB = 3:2, connecting AQ and BP. Let their intersection be r, if the vector OA is vector a and the vector ob is vector B Use vector a and vector B to represent vector or
5. We know that vector a = (cos3 / 2x, SIN3 / 2x), vector b = (cosx / 2, - SiNx / 2), and 0 The second question f (x) = (vector a dot multiplied by vector b) - 2 times m multiplied by (absolute value of a + b) The minimum value of F (x) is - 3 / 2, and the value of real number m is obtained
6. Vector, how many kinds of explanation, its basic meaning is what, in UG vector is what consciousness, new people for guidance
7. Maxwell's law of total current: ∮ l HDL = I (total), who can explain the meaning of the integral part on the left side of the equal sign Such as the title
8. Explain the meaning of electricity
9. #define TAILQ_ INSERT_ AFTER(head,listelm,elm,field) do { \ if ((TAILQ_ NEXT((elm),field) = TAILQ_ NEXT((listelm),field)) = NULL)\ TAILQ_ NEXT((elm),field)-> field.tqe_ prev = \ &TAILQ_ NEXT((elm),field); \ else \ (head)->tqh_ last = &TAILQ_ NEXT((elm),field); \ TAILQ_ NEXT((listelm),field) = (elm); \ (elm)-> field.tqe_ prev = &TAILQ_ NEXT((listelm),field); \ } while (0)
10. In △ ABC, a, B and C are the opposite sides of angles a, B and C respectively. Given vector M = (a, b), vector n = (COSA, CoSb), vector p = (2 √ 2Sin (B + C) / 2,2sina), if vector m ‖ vector n, vector p ^ 2 = 9, we prove that △ ABC is an equilateral triangle
11. What's the difference between vector and vector?
12. The difference between vector and vector~~ What's the difference between vector and vector, or do they mean the same thing?
13. Vector addition and subtraction, I can only draw and calculate, how to do
14. Mathematical vector judgment If vector a is parallel to vector B and vector B is parallel to vector C, then vector a is parallel to vector C
15. A judging problem of vector Let a, B and C be arbitrary non-zero plane vectors which are not collinear with each other 1.（a*b)*c-(c*a)*b=0 2.|a|-|b|＜|a-b| 3. (b * c) * a - (c * a) * B is not perpendicular to C 4.（3a+2b)*(3a-2b)=9|a|²-4|b|² Hope there is an explanation thank you
16. Simple vector judgment The necessary and sufficient condition for vectors a and B to be collinear is that "there exists n ∈ R, B = n * a" The answer is incorrect. Why? (2008 Hainan, Ningxia, Wen 9 li 8)
17. On the judgement of vector If E1 and E2 are a set of bases of all vectors in the plane, then any vector a in the space can be expressed as A = n1e1 + n2e2 (N1. N2 is a real number)
18. Vector judgment "If | a | = | B |, a and B are vectors, then a and B have the same length and the same or opposite direction." What's wrong with this sentence? Why? Thank you!
19. How to calculate the square of vector a minus the square of vector B
20. How to calculate a vector = 8 B vector = 7 a vector minus B vector?