Una onda pasa por una frontera donde su velocidad varia de 6 km/s a 8,5 km/s. Si llega a la frontera formando un angulo de 40 grados... ¿cuál es el ángulo de refraccion?

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.

    5.5 n======    assuming that      we have      m = 0.145 kg    a = 38 m/s²therefore    5.51 n, but two significant figures.final answer: 5.5 n

It equals just about 6,300 km per hour each day an week