Answer:
Its angular speed is 0.105 rad /s. The minute hand of a clock takes 60 minutes = 60 x 60 seconds to complete one rotation.
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Explanation:
A line that's 'normal' to the surface is perpendicular to the surface.
The angle of incidence is the angle between the normal and the light ray ARRIVING at the surface.
The angle of reflection is the angle between the normal and the light ray LEAVING the surface after it's reflected.
The law of reflection says these two angles are equal.
Answer:
because otherwise the harmful Ultraviolet rays of the sun penetrates the Earth's surface and causes numerous diseases in humans like skin cancer, cataract etc.
A dog with four legs is an intact, marginally redundant, canine quadruped.
