light, water, carbon dioxide
Explanation:
c02 , h20 and light
Answer:
θ_c = 36.87°
Explanation:
Index of refraction for index medium; n_i = 2
Index of refraction for Refractive medium; n_r = 1.2
Formula to find the critical angle is given;
n_i(sin θ_c) = n_r(sin 90)
Where θ_c is critical angle.
Thus;
2 × (sin θ_c) = 1.2 × 1
(sin θ_c) = 1.2/2
(sin θ_c) = 0.6
θ_c = sin^(-1) 0.6
θ_c = 36.87°
From Newton's second law of motion,
F = m*a
= m * (change in velocity)/time [As a = (change in velocity)/time]
From the question, we know
F = 400 N, time = 5 s
Therefore,
400 = 1000 * (change in velocity)/5
i.e. change in velocity = 2 m/s
Momentum = m * velocity
Therefore,
Change in momentum = (change in mass) * (change in velocity)
= 1 * (change in velocity) [As m remains the same]
= 1 * 2
= 2 kgm/s
Refer to the diagram shown below.
The vertical distance traveled is
s = 25 m
The initial vertical launch velocity is zero.
Therefore
s = (1/2)*g*t²
where g = 9.8 m/s²
t = the time of flight, s
That is,
0.5*9.8*t² = 25
t² = 25/4.9 = 5.102
t = 2.26 s
Answer: 2.26 s