Answer:
1. Not to have enough salt water on the foil
2.not cleaning the foil well to remove interfering materials
Water is the answer out of all the other options
KI is the formula to potassium
The higher levels of gravity put on an object the more weight the object has. For example someone who weighs say 100 lbs would weigh more if higher amounts of gravity would be applied to them. And less if less gravity was applied. But larger objects will automatically have more gravity applied to them than something smaller due to the gravitational pull needing to pull harder to keep the object to the planet's surface. Hope this helps! :)