They will difuse into one solution of uniform strength
It depends on the amount and the strength of the solutions. If both solutions are equal in volume and strength, then the base would neutralise the acid. Thus forming a neutral substance.
At high temperature the strength decrease.
It increases.
Mental
it will rust and then turn green
What happens when you rub sandpaper back and forth over a piece of wood? The strength of the friction force depends upon the types of surfaces involved and how hard the surfaces push together.
Two or more elements combine to form a solution.
After this reaction a salt is formed.
When you lose your strength all of a sudden, you collapse and suffer some dizziness.
The strength is increased, this is how Roller Coasters operate.
When two metals are mixed together, they can form an alloy. Alloys combine the properties of both metals, such as strength, durability, and resistance to corrosion. The exact properties of the resulting alloy will depend on the metals used and their proportions.
Nothing "happens".