8.Why does the temperature not change when ice melts to form water? 9. Cotton is solid but it floats on water. Why? 10.A balloon when kept in sun, bursts after some time. Why
Answers
Answer:
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Explanation:
Cotton has lesser density than water and also has lots of air spaces so it floats for some time and then sinks
Air expand due to temperature while kept in the sun. Materials expand in high temperature so the air expands and the balloon bursts
Hope you got this
Answer:
other words, the water molecules within ice move faster. However, temperature doesn't change as heat is added during a phase change; for example, when the ice melts. During the phase change, the added heat doesn't make the molecules move faster, but rather further apart.
9. cotton has a porous structure, the air gets trapped between the pores making overall density of the cotton less then the water hence the cotton floats on the water. when the water replaces the air the pores, the density increases and the cotton sinks.
10.The kinetic energy of gases increases with the increase in the temperature. When the balloon is kept in the sun, due to Sun's heat, the kinetic energy of gaseous particles inside the balloons also gets increased and the balloon expands. ... It continues to expand and comes to a stage when the balloon bursts.
Explanation:
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