26°F
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There are different types of contact forces like normal Force, spring force, applied force and tension force.
Answer: Option (C) is the correct answer.
Explanation:
When we heat a fluid then the movement within the fluid makes hot (less dense) material to rise and cooler (more denser) material to sink at the bottom. This process is known as convection.
Thus, in the diagram hot (less dense) water will rise and cooler (more dense) water sinks at the bottom.
Therefore, we can conclude that according to the arrow the label belongs to cooler water sinks.
Explanation:
Could you also show the diagram
The correct answer is
<span>Density
In fact, the density of an object is the ratio between its mass m and its volume V:
</span>

<span>if the size of the object changes, its volume V changes as well, therefore the density d must change.</span>