Answer:
30°
Explanation:
According to the second law of reflection, it States that the angle of incidence i is equal to the angle of reflection r.
The angle of incidence is known to be the angle between the incident ray and the normal.
The Angle of reflection is the angle between the reflected ray and the normal.
This normal ray is a ray that is perpendicular to the surface.
According to the question, if the beam of light is reflected off the surface and its angle of incidence is 30°, its angle of reflection will also be 30° i.e i=r = 30°
B is you answer sorry i dont quite know how to explain it in a way that you and anybody else would understand it.
Most probably physical, even though the change of liquids to solids is directly related to chemistry too
Explanation:
Balanced forces will cause no change in the speed of an object.
