No it is not a solution.
using a screen
no
can nails and screws be a solution?
The motion of the bottle cap and marbles was caused by the initial force applied to them. When the cap was flicked, it transferred its energy to the marbles, causing them to move. Additionally, the force of gravity played a role in pulling the marbles downwards.
Sand and marbles would not be a solution. A solution has a solute (a solid) and a solvent (a liquid). You must also not be able to just separate the two. Sand and marbles would not be a solution because you can simply pick out the marbles, and there is no solvent!
No, it is a mixture.
The marbles will pulverize the salt crystals so much that the salt looks like a powder but the salt has actually been reduced to very small crystals.
After keeping iron nails in a copper sulfate solution for about half an hour, you will observe that the color of the iron nails changes to a reddish-brown due to the deposition of copper on the surface of the nails. The blue color of the copper sulfate solution will fade as copper is transferred from the solution to the nails.
it's a mixture !
Sand, marbles, and water can be a mixture.
There is no possible solution since "you" would have to have a negative number at the start.
Do you have nails in the bottle, or do you have a container with nails and bottles in it? If the nails are in the bottle, you can cut the top off the bottle and dump them out. If they're in a container, just pick the bottles out by hand. No complex techniques are needed because plastic bottles are big enough to pick up with your hands.