Given that vectors E1 and E2 are a group of bases in the plane (1) if AB = E1 + E2, BC = 2E1 + 8e2, CA = te1-t ^ 2e2, and a, B, C are not collinear, find the value of real number k (2) try to determine the value of real number K, make ke1-e2 and e1-ke2 collinear and opposite

Given that vectors E1 and E2 are a group of bases in the plane (1) if AB = E1 + E2, BC = 2E1 + 8e2, CA = te1-t ^ 2e2, and a, B, C are not collinear, find the value of real number k (2) try to determine the value of real number K, make ke1-e2 and e1-ke2 collinear and opposite

1. CA = CB + Ba = - bc-ab = - 3e1-9e2 = te1-t ^ 2e2, then t = - 3
2. If collinear, then K / 1 = - 1 / - K, k = + 1 / - 1
If reverse, k = + 1, k = - 1

Why isn't magnetic flux a vector, B a vector and s a scalar

The magnetic flux emphasizes the number of magnetic induction lines (i.e. the size of B) perpendicular to the flux in the area s. The tension adjustment is not the direction, so there is no direction, and the direction must be perpendicular. The non perpendicular of s should be converted into a vertical quantity, so is it meaningful if the magnetic flux is a vector?

Is work a vector or a scalar? What are the common vector scalars in high school

As long as you understand vector and scalar, rote learning has been separated from the essence of learning. Vector is a physical quantity with size and direction. The reason why we consider direction is that direction is of great significance to this physical quantity and will have an important impact. For example, force and displacement are vectors, and direction is very important for them