Physical weathering can affect a sample by changing the characteristics of the rock and they can be changed into boulders, cobbles, pebbles, sand, silt, clay, and colloids.
It is false. The salt bridge is not a path for electrons, but a path for ions to flow from one half-cell to another. It help to balance the charge between the oxidation and reduction vessels.
An electrical fire would only be made worse by adding water. Using a CO2 extinguisher is smarter because it cools what ever has been set on fire making it less likely to light on fire again.
