Calculating the average speed is simple using the formula <span>speed = distance/time</span>
Answer:
a) The angle of refraction is approximately 34.7
b) The angle the light have to be incident to give an angle of refraction of 90° is approximately 53.42°
Explanation:
According to Snell's law, we have;

The refractive index of the glass, n₁ = 1.66
The angle of incident of the light as it moves into water, θ₁ = 27.2°
a) The refractive index of water, n₂ = 1.333
Let θ₂ represent the angle of refraction of the light in water
By plugging in the values of the variables in Snell's Law equation gives;


θ₂ = arcsin(0.5692292265) ≈ 34.7°
The angle of refraction of the light in water, θ₂ ≈ 34.7°
b) When the angle of refraction, θ₂ = 90°, we have;


θ₁ ≈ arcsin(0.803) ≈ 53.42°
The angle of incident, θ₁, that would give an angle of refraction of 90° is θ₁ ≈ 53.42°
Answer:
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Explanation:
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Answer:
22.3Ns
Explanation:
Hi!
To solve this exercise follow the steps below.
1. Find the weight of the stone by multiplying the gravity (9.8m / s ^ 2) by the mass.
W=mg
m=mass=2.5kg
g=gravity=9.8m / s ^ 2
W=(2.5)(9.8)=25.5N
2. Find the time it takes for the stone to touch the ground using the kinematic equation for constant acceleration.
Vf=Vo+a.t
y= VoT+\frac{1}{2}gt^{2}
Where
Vo = Initial speed
=0
T = time
g=gravity=9.8m/s^2
Y= height= 3.75m
solving for time

3. For a constant force such as weight, the impulse is calculated as the product between force and time.
I=wt
I=(25.5N)(0.87S)=22.3Ns