1) Johnny completing the spring lab, and makes 12 waves in 10 seconds. What is the

frequency of the waves Johnny makes?

1.2 Hz

Explanation:

Frequency: This can be defined as the number of cycles completed in one seconds. The unit of frequency is Hertz (Hz)

From the question above,

f = N/t Equation 1

Where f = frequency, N = number of wave or cycle completed by Johnny, t = time take to complete the waves.

Given: N = 12 waves, t = 10 s

Substitute into equation 1

f = 12/10

f = 1.2 Hz

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.