Answer:
The magnitude of the given vector is ![\sqrt{14}](https://tex.z-dn.net/?f=%5Csqrt%7B14%7D)
Explanation:
For any given vector ![\overrightarrow{r}=x\widehat{i}+y\widehat{j}+z\widehat{k}](https://tex.z-dn.net/?f=%5Coverrightarrow%7Br%7D%3Dx%5Cwidehat%7Bi%7D%2By%5Cwidehat%7Bj%7D%2Bz%5Cwidehat%7Bk%7D)
The magnitude is given by
![|r|=\sqrt{x^2+y^2+z^2}](https://tex.z-dn.net/?f=%7Cr%7C%3D%5Csqrt%7Bx%5E2%2By%5E2%2Bz%5E2%7D)
comparing with the given vector ![\overrightarrow{A}=1\widehat{i}-2\widehat{j}+3\widehat{k}](https://tex.z-dn.net/?f=%5Coverrightarrow%7BA%7D%3D1%5Cwidehat%7Bi%7D-2%5Cwidehat%7Bj%7D%2B3%5Cwidehat%7Bk%7D)
we get
x = 1, y = -2, z = 3
Thus the magnitude of vector A is
![|r|=\sqrt{1^2+(-2)^2+3^2}\\\\\therefore |r|=\sqrt{14}](https://tex.z-dn.net/?f=%7Cr%7C%3D%5Csqrt%7B1%5E2%2B%28-2%29%5E2%2B3%5E2%7D%5C%5C%5C%5C%5Ctherefore%20%7Cr%7C%3D%5Csqrt%7B14%7D)
Some scientist believe that the ozone layers of the earth had been weakening and the waters or current changes direct ever 5-7 month.
Answer:
It is directed inward, toward the center of a circle.
The answer is <span>a. hydrogen bond.
The weakest bonds are hydrogen bonds. This means that they can easy be broken down. Covalent bonds, metallic bonds, and electrovalent (or ionic) bonds are much stronger bonds. </span>
Answer:
elastic collision
An elastic collision occurs when the two objects "bounce" apart when they collide. Two rubber balls are a good example. In an elastic collision, both momentum and kinetic energy are conserved. Almost no energy is lost to sound, heat, or deformation.
I hope it's helpful!