The speed of sound through air at 20°C is 343 meters per second. The speed of sound through fresh water at 20°C is
1,482 meters per second.
Which of the following could be the speed of sound through solid steel?
A. 353 meters per second
B. 145 meters per second
C. 5,960 meters per second
D. 1,370 meters per second

false br

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.

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