You lay a mirror flat on the floor with one edge against a wall and aim a laser at the mirror. The ray reflects from the mirror and strikes the wall. The plane of the incident and reflected rays is perpendicular to the wall. The ray from the laser strikes the mirror 43.3 cm from the wall, and the reflected ray strikes the wall 38.3 cm above the mirror. Find the angle of incidence of the laser ray on the mirror.

Explanation:

We are given that

Distance of the point from the wall where the ray strikes=43.3 cm

Distance of the point from the wall where the reflected ray strikes=38.3 cm

We have to find the angle of incidence of the laser ray on the mirror.

Let angle of incidence of the laser ray on the mirror=

By using the formula

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

answer: a. same unit

explanation: