The answer is D. This is because liquids take up the shape of the container they are in, so it is never definite. Where as solids stay the same shape.
Using tides is a clean source of energy and can generate energy for hundreds of homes.
When the enthalpy change of the reaction is positive, the reaction is exothermic.
The answer is option a, that is " <span>electromagnetic repulsions</span><span>".
The sun generates energy by nuclear fusion, and converts a part of its mass into energy and nuclear fusion is the source of all energy that is released by the sun. The two things which are required for the process of nuclear fusion are high temperature and the high densities.
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