Answer:
Boiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water.
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Explanation:
The concept required to solve this problem is hydrostatic pressure. From the theory and assuming that the density of water on that planet is equal to that of the earth
we can mathematically define the pressure as

Where,
= Density
h = Height
g = Gravitational acceleration
Rearranging the equation based on gravity

The mathematical problem gives us values such as:



Replacing we have,


Therefore the gravitational acceleration on the planet's surface is 
When white light is diffracted and blue color is seen is due to the absorbance of wavelength of all other color except blue.
<u>Explanation:
</u>
- The white light diffracts into rainbow colors which are the 7 colors present in form of VIBGYOR.
- VIBGYOR is the violet, Indigo, Blue, Green, Yellow, Orange and Red.
- When the blue color is seen denotes the shortest wavelength being reflected and all other being absorbed at the specified location.