When fluids are heated from the bottom, convection currents are pro...

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When fluids are heated from the bottom, convection currents are produced because
[UPSEAT 2000]
\( \mathrm{P} \)
(a) Molecular motion of fluid becomes aligned
(b) Molecular collisions take place within the fluid
W
(c) Heated fluid becomes denser than the cold fluid above it
(d) Heated fluid becomes less dense than the cold fluid above it
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