Answer:
Fan speed
Explanation:
because is the dependent variable
The effect on the climate is that the climate goes up
0.289352 days is the 25000 seconds.
Answer:
b) the refracted ray has an angle of 90 degrees
Explanation:
The angle of incidence is measured with respect to the normal separation of the media. The critical angle for total internal reflection occurs is:

Here
and
are the refractive index of the mediums. This equation is an application of Snell's law, for the case where the refracted ray has an angle of
.
I think it should be option (b)