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KANARAM SAINI
KANARAM SAINI

Junior College 1 chevron_right H2 Maths chevron_right India

Physics questions

Date Posted: 10 months ago
Views: 97
KANARAM SAINI
KANARAM SAINI
10 months ago
Why

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AC Lim
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343 answers (A Helpful Person)
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KANARAM SAINI
KANARAM SAINI
10 months ago
Why
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Yijia
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11 answers (A Helpful Person)
When water freezes, it form a lattice like structure due to its hydrogen bond. Such that there empty spaces in between the molecules. Therefore, increasing the volume. Density = mass / volume. Higher volume = lower density. Therefore ice floats. Hence when ice melts, it's volume decreases.
snell
Snell
10 months ago
From 0 deg C to 4 deg C, density of water increases. Hence, volume of water decreases.

However, above 4 deg C, water behaves just like any other material; it expands. Hence, volume of water increases.

*This is how frozen lake surface formed with fishes still able to swim (alive) below the frozen ice in water of temp. of around 4 deg C.

ans: D