An ambulance is traveling north at 64.4 m/s, approaching a car that is also traveling north at 33.7 m/s. The ambulance driver hears his siren at a frequency of 554 Hz.
At what frequency does the driver of the
car hear the ambulance’s siren? The velocity
of sound in air is 343 m/s. Answer in units of Hz.

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

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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.