If you collected evidence at a crime scene, why would you run tests on ballistic/firearm or do a blood spatter analysis.

For the blood splatter analysis, to see what was the cause of death by analysing the direction of the blood.

For the ballistic/firearm, to know what weapon/gun was used.

Explanation:

the mass of the cathode increases because ions from the solution get reduced to atoms and become part of the cathode.

explanation:

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stan bts

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.