The pH of a solution decreases by 2.0. How does the hydronium ion concentration of the solution change? increases to 2 times the original concentration increases to 100 times the original concentration decreases to one one hundredth. of the original concentration decreases to one half. of the original concentration

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.