Answer:
0.79
Explanation:
Using Snell's law, we have that:
n(1) * sin θ1 = n(2) * sinθ2
Where n(1) = refractive index of air = 1.0003
θ1 = angle of incidence
n(2) = refractive index of second substance
θ2 = angle of refraction
The angle of reflection through the unknown substance is the same as the angle of incidence of air. This means that θ1 = 32°
=> 1.0003 * sin32 = n(2) * sin42
n(2) = (1.0003 * sin32) / sin42
n(2) = 0.79
Answer:
Yes, lava is a liquid, that cools into rock, which is a solid.
Answer:
F = 2553.6 N
Explanation:
v² = u² + 2as
0² = 16² + 2a4.0
a = -32 m/s²
F = ma = 79.8(32) = 2553.6 N
