1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
stiv31 [10]
3 years ago
6

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 a=33.7 cm from the wall. The reflected beam strikes the wall at a height b=36.7 cm above the surface of the mirror. Find the angle of incidence θi at which the laser beam strikes the mirror.

Physics
1 answer:
Elena L [17]3 years ago
5 0

Answer:

The angle of incidence is  \theta_i  =42.6^o

Explanation:

The diagram for this question is shown on the first uploaded image

From the question we are told that

   The distance between the mirror and the wall is  a = 33.7 cm

    The height of the above the mirror is  b = 36.7 cm

Generally the angle which the reflected ray make with the mirror is mathematically evaluated as

             \alpha  =tan ^{-1} (\frac{b}{a})

substituting values

             \alpha = tan ^{-1}( \frac{36.7}{33.7})

            \alpha =47.4^o

From the diagram we can deduce that  the angle of incidence is

             \theta_i  = 90 - \alpha

So          \theta_i = 90 - 47.4

              \theta_i  =42.6^o

You might be interested in
What ocean depth would the volume of an aluminium sphere be reduced by 0.10%
yKpoI14uk [10]

Answer:

6400 m

Explanation:

You need to use the bulk modulus, K:

K = ρ dP/dρ

where ρ is density and P is pressure

Since ρ is changing by very little, we can say:

K ≈ ρ ΔP/Δρ

Therefore, solving for ΔP:

ΔP = K Δρ / ρ

We can calculate K from Young's modulus (E) and Poisson's ratio (ν):

K = E / (3 (1 - 2ν))

Substituting:

ΔP = E / (3 (1 - 2ν)) (Δρ / ρ)

Before compression:

ρ = m / V

After compression:

ρ+Δρ = m / (V - 0.001 V)

ρ+Δρ = m / (0.999 V)

ρ+Δρ = ρ / 0.999

1 + (Δρ/ρ) = 1 / 0.999

Δρ/ρ = (1 / 0.999) - 1

Δρ/ρ = 0.001 / 0.999

Given:

E = 69 GPa = 69×10⁹ Pa

ν = 0.32

ΔP = 69×10⁹ Pa / (3 (1 - 2×0.32)) (0.001/0.999)

ΔP = 64.0×10⁶ Pa

If we assume seawater density is constant at 1027 kg/m³, then:

ρgh = P

(1027 kg/m³) (9.81 m/s²) h = 64.0×10⁶ Pa

h = 6350 m

Rounded to two sig-figs, the ocean depth at which the sphere's volume is reduced by 0.10% is approximately 6400 m.

6 0
3 years ago
1. What are the 2 main categories of nonmetals?
Anettt [7]

the 2 main categories of nonmetals are REACTIVE NONMETALS an NOBLE GAS.

hope it helps

7 0
4 years ago
PLZ HELP NO SNEAKY LINK OR I WILL REPORT U OR NON ANSWERS
Lana71 [14]
Core
Home of atoms of hydrogen also the lightest element in the universe.
Radiative Zone
Outside the inner Core it radiates energy through the process of photon emission.
Convection Layer
Outer most Layer of the Core, it extends form a depth of 200,000 kilometres to the visible surface. Energy is created by Convection. This is where light is produced.
Photosphere
Surrounds the stars and is where light and heat radiate.
Chromosphere
Reddish gas layer outside of the photosphere I think it also works with the Corona.
Corona
Aura of Plasma that surrounds the Sun and other stars, it extends millions of kilometres and easily seen during a total eclipse.
8 0
3 years ago
The amount of kinetic energy an object has depends upon which of the following factors? I. the object's velocity II. the object'
harina [27]

1.) The object's Velocity

Faster it goes, more kinetic energy it has

8 0
3 years ago
Which of the following statements describes a compound machine?
ASHA 777 [7]
From the word compound, the compound machine is already a combination of two or more types of simple machine. Thus, the answer is letter C. Because of its complexity, it is able to perform several other functions than a simple one. 
6 0
3 years ago
Read 2 more answers
Other questions:
  • True or False: Inertia is the property that every material object has that causes objects to resist changes in its state of moti
    14·1 answer
  • What is the term of movement in a particular direction
    5·1 answer
  • 1.When I cook an egg in a microwave oven, the device uses electromagnetic energy to increase the kinetic energy of particles of
    9·1 answer
  • During the winter animals sit into crul , why ?​
    5·1 answer
  • Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +6q. Sphere B carries a charge of -q. Sphere C
    8·1 answer
  • An object has 16N of force being applied to the right, 16N of force being applied to the left, and 4N of force being applied dow
    14·1 answer
  • A 4.00 kg ball is moving at 4.00 m/s to the EAST and a 6.00 kg ball is moving at 3.00 m/s to the NORTH. The total momentum of th
    8·1 answer
  • A fire engine is rapidly approaching you at a stop light. What happens to the frequency and pitch of the sound as the fire engin
    15·1 answer
  • What was Robert Boyle's most famous discovery about gases​?
    5·1 answer
  • Why do we perform stork stand test
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!