A wave has frequency of 50 Hz and a wavelength of 10 m. What is the speed of the wave?
1 answer:
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Answer:
Away from the normal
Explanation:
The direction toward which the ray of light bend can be found by using Snell's law:
where
n1, n2 are the index of refraction of the first and second medium
are the angle of the incident and refracted ray with respect to the normal to the surface
Here, the ray of light moves from a material with high index of refraction to a material with lower index, therfore we have
Re-arranging Snell's equation we get
and since
we find
which means that the ray of light bends away from the normal.
Answer:
a = 2.72 [m/s2]
Explanation:
To solve this problem we must use the following kinematics equation:
where:
Vf = final velocity = 1200 [km/h]
Vo = initial velocity = 25 [km/h]
t = time = 2 [min] = 2/60 = 0.0333 [h]
1200 = 25 + (a*0.0333)
a = 35250.35 [km/h2]
if we convert these units to units of meters per second squared