3. Answer the following questions in 30-40 words: a) Keerthi placed objects X and Y in water. Object X Object Y Water (i) Which of these objects would sink? Give reasons for your answer. (ii) Name two materials that sink in water.
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Answer:
a) Keerthi placed objects X and Y in water.
Object X
Object Y
Water
(i) Which of these objects would sink? Give reasons for your answer.
(ii) Name two materials that sink in water.
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2
Answer:
Explanation:
If Keerthi places both Object X and Object Y in water, then Object X would sink in water.
We know,
An object will float, if it is less dense than the liquid it is placed in.
An object will sink, if it is more dense than the liquid it is placed in.
Observe that Object X is a solid, which have very closely packed particles, making it a more denser object. Hence, if the relative density of Object X becomes more than water, then it would sink.
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