Some students placed a clear solution in a beaker and heated it for 40 minutes. Their observations are provided. Time (minutes) Observations 10 Bubbles on the bottom of the beaker are visible 20 Water is rapidly boiling 30 Water level in beaker has decreased 40 White crystals have formed on the edges of the beaker Evidence that the solution contained matter that could not be seen was observed during what time? 10 minutes о O 20 minutes O 30 minutes O 40 minutes​

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

im guessing the west of station b

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.