Question:
An iron cube floats in a vessel containing mercury at $20^\circ C$. If the temperature is increased by $100^\circ C$, then the cube will float
An iron cube floats in a vessel containing mercury at $20^\circ C$. If the temperature is increased by $100^\circ C$, then the cube will float
Show Hint
Decrease in fluid density → object sinks more.
Updated On: Apr 16, 2026
- lower
- higher
- at same level
- lower or higher depending on mass of cube
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: On heating, density of mercury decreases.
Step 2: Buoyant force $= ρ V g$ decreases.
Step 3: To balance weight, more volume must submerge.
Step 4: Hence cube sinks more → floats lower.
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