Evaporation.
There may be a leak in the cooling system.
When engine is cool, Look in radiator and see if the antifreeze is full. Mechanics use more information of problem to diagnose, like, Where is leak at under the car? Air conditioners can cause water drip from car but that is normal. No matter what is causing the drip you will also need to clean/fix the problem that is causing the rusty color too.
If you mean it suddenly started loosing coolant, then look for a leak. If you see no leak then suspect a blown head gasket. Stop driving the car until you get this repaired. If you continue to drive a car with a blown head gasket you will destroy the engine.
No they use dry acid if its wet then they will leak out like a car battery.
First, When does it leak water? Does it leak water when it is filling, when it is draining, or when it is just sitting there full of water, or is something else going on? Where outside the tub is the leak?
Some foreign car makers use a purple colored anti-freeze, so my guess would be you have an coolant leak.
probably not you have a gas line leak
Only if if has a leak.
A roof leak will only be around when it's raining and a plumbing wall leak will be there forever. Which do you have? Food coloring in water and poured down suspected leak paths is very useful. Use different colors.
When the cooling water leaks outside you can somehow survive by refilling it oftem, but when it leaks into motor oil or into the cylinder space your engine will be brick dead soon if the leak is not stopped soon.
Sometimes when a vehicle is stored for aperiod of time transmission seals shrink and start to leak from lack of use
No, it is not intended for that and performs poorly.