Answer:
Rowan's feet appears at a distance of 0.451 m under water
Solution:
As per the question:
Actual depth in water, d = 0.60 m
Normal distance of her feet from her eyes, D = 1.60 m
Now,
We know that refractive index of water, 
Thus
To calculate the apparent height of her feet:


Explanation:
The orbital radius of the Earth is 
The orbital radius of the Mercury is 
The orbital radius of the Pluto is 
We need to find the time required for light to travel from the Sun to each of the three planets.
(a) For Sun -Earth,
Kepler's third law :

M is mass of sun, 
So,

(b) For Sun -Mercury,

(c) For Sun-Pluto,

Answer:
The input force that you use on an inclined plane is the force with which you push or pull an object. The output force is the force that you would need to lift the object without the inclined plane. This force is equal to the weight of the object.
Explanation:
When light passes through one transparent medium to another transperent medium it bends and that beding of light is know as refraction of light !
Answer:
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