Question

statement(1): When a beaker containing liquid is heated the center of mass of the system first falls down then rises up above the initial position.stat

statement(2): The liquid in the beaker undergoes expansion on heating and the expansion of liquid is more than that of the beaker.

• A. Both statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1
• B. Both statement 1 & statement 2 are true but statement 2 is not the correct explanation of statement 1.
• C. statement 1 is true but statement 2 is false
• D. statement 1 is false but statement 2 is true

Answer 1

The correct option is A Both statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1

The heating becomes from heating the container. When initially heat is given, the container begins to expand. Until the heat reaches the liquid, the container expansion results in decrease in level of liquid. Hence the center of mass falls down.
Once the heat starts reaching the liquid, the liquid expands more than the vessel and thus the level increases then. This results in rise in the center of mass of the system.