The question is poor. Light doesn't refract on its way THROUGH anything. It refracts at the boundary BETWEEN two different media. The effect is greatest where the ratio of the speeds of light in the two media is greatest. On your list, that would be at the boundary between air or space and glass.
The period of the wave would be halved
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Explanation:
PE = mgh = 60(9.8)(2.0) = 1176 J
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Explanation:
Polar coordinates formula
Summary. To convert from Polar Coordinates (r,θ) to Cartesian Coordinates (x,y) : x = r × cos( θ ) y = r × sin( θ )
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Humus
Explanation:
Its Humus I believe. I remember learning something like this.