ACTIVIDAD 1. Relaciona cada teoría sobre la luz con su autor:
C. La luz proviene del sol, siendo los ojos receptor y no emisor
D. Demostró de forma teórica la naturaleza ondulatoria de la luz
E. La luz un pequeño pectro de ondas electromagnéticas
F. Comprobó la naturaleza ondulario de la luz haciendo experimentos sobre interferencias
y difracción
Almacé
Ochstian Huygens Thomas Young James Maxwell
Jean Fresnel
Isaac Newton.

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Ответ:

CameronVand21

10.09.2020

Mathematics

1. let r be the point with unknown x-coordinate. consider vectors $\overrightarrow{qr}=())=(x+14)$ and $\overrightarrow{rs}=(2-x).$

these vectors are colinear and

$\dfrac{\overrightarrow{qr}}{\overrightarrow{rs}}=\dfrac{3}{5}.$

then

$\dfrac{x+14}{2-x}=\dfrac{3}{5},\\ \\5(x+14)=3(2-x),\\\\5x+70=6-3x,\\\\8x=-64,\\\\x=-8.$

2. if you need correct formula, then

$\dfrac{x_r-x_q}{x_s-x_r}=\dfrac{m}{n},\\ \\n(x_r-x_q)=m(x_s-x_r),\\\\nx_r-nx_q=mx_s-mx_r,\\\\x_r(n+m)=mx_s+nx_q,\\\\x_r=\dfrac{mx_s+nx_q}{m+n}.$

answer: point r partitions the directed line segment from q to s in a m: n, the ratio to determine point r is

$x_r=\dfrac{mx_s+nx_q}{m+n}.$

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