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tensa zangetsu [6.8K]
3 years ago
7

Kyle lays a mirror flat on the floor and aims a laser at the mirror. The laser beam reflects off the mirror and strikes an adjac

ent wall. The plane of the incident and reflected beams is perpendicular to the wall. The beam from the laser strikes the mirror at a distance ????=55.9 cm from the wall. The reflected beam strikes the wall at a height ????=38.9 cm above the surface of the mirror. Find the angle of incidence thetai at which the laser beam strikes the mirror.
Physics
1 answer:
fgiga [73]3 years ago
6 0

Answer:

θr = 55.2 °

Explanation:

The law of reflection states that the angle of incidence and the angles of reflection is the same.

Let's use trigonometry to find the angle between the reflected ray, where the horizontal distance x = 55.9 cm and the vertical distance is y = 38.9 cm

    tan θ = y / x

    tan θ = 38.9 / 55.9

    θ = tan⁻¹ (0.6959)

    θ = 34.8°

This angle is measured with respect to the x-axis (horizontal), but in general the angles in optics are measured from the y-axis so that the angle is

    θ = 90 - 34.8

    θr = 55.2 °

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Reset

Next

2020 Edimentum. All rights reserved.

Answer:

d) people with gluten sensitivity

e) people considering making a lifestyle change

Explanation:

Gluten can be defined as protein that is found is starchy grains such as wheat, rye, barley e.t.c.

One of the main or major functions of gluten is when wheat is used to make dough for bread, pasta, pizza e.t.c , the stretching or elasticity of the dough is due to the presence of gluten in the dough.

Despite these desirable quality, it has been discovered the people are allergic to gluten and these days we have gluten free foods or restaurant that served gluten free foods such as bakes, cakes e.t.c.

One of the allergies of gluten is called Celiac disease. Celiac disease is an allergy that makes it difficult for the human body to be able to digest gluten as well absorbing other food nutrients. This results in symptoms such as flatulence, bloating, diarrhea, vomiting, stomach pain, weight loss e.t.c.

We have been educated in the passage that although it quite difficult for people with Celiac disease to eat at restaurants, but in other to effectively manage the allergy, when you want to eat out, it is best to call the restaurant first to verify if they have gluten free meals or ask the waiter if they have gluten free meals.

The two target audience for the above passage in the question titled "Gluten Free" are:

d) people with gluten sensitivity

e) people considering making a lifestyle change

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