Imagine you can take all the atoms in a single drop of water and put them on a single line as closely packed as they can be. how long would that line be in meters? there are approximately 1022 atoms in a droplet of water. a) 10^12 meters which is bigger than the distance between sun and earth. b) 10^20 meters, the size of a galaxy. c) 10^3 meters, this is one kilometer. d) 10^7 meters which is about the circumference of the earth.

option a

Explanation:

Size of an atom (diameter) = 10⁻¹⁰ m

There are approximately 10²² atoms in a single drop of water. If they are put in  a straight line, the length would be

l = diameter of an atom × number of atoms

l = 10²²×  10⁻¹⁰ m = 10¹² m

Distance between the Sun and the Earth is 1.47 × 10¹¹ m. The calculated length is greater than the distance between the Sun and the Earth.

Thus, option a is correct.

i need the answer to this too but idk it ; -;

no. dot product   =0 when vecs at right angles