.Un bloque uniforme de 20 cm de longitud y 20 cm de altura descansa en un plano inclinado. Una pequeña ondulación evita que resbale por el plano,
¿cuál es el ángulo entre el plano inclinado y la horizontal, a partir del cual
comienza a voltearse el bloqué

i was thinking more like reflects green light, just not sure

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.

i would say

amplitude

hope this