Question

A mercury-f
i
lled glass thermometer is originally at equilib-
rium in a 20°C water bath. The thermometer is then immersed
in a 30°C water bath. The column of mercury in the ther-
mometer will
(A)
rise to 30°C and then stop.
(B)
i
rst rise above 30°C,
then return to 30°C and stop.
(C)
i
rst fall below 20°C,
then rise to 30°C and stop.
(D)
i
rst fall below 20°C,
then rise above 30°C,
and fi
nally
return to 30°C and stop.​

Answer 1

Answer:

I think it's option (d) but not sure mate sry

Answer 2

The complete question is

A mercury-filled glass thermometer is originally at equilibrium in a 20°C water bath. The thermometer is then immersed in a 30°C water bath. The column of mercury in the thermometer will

(A) rise to 30°C and then stop.

(B) first rise above 30°C, then return to 30°C and stop.

(C) first fall below 20°C, then rise to 30°C and stop.

(D) first fall below 20°C, then rise above 30°C, and finally return to 30°C and stop.

The correct answer is

option (D)

the first fall below 20°C, then rise above 30°C, and finally return to 30°C and stop.

When heated, the molecules of the liquid within the measuring system move faster, inflicting them to induce a touch more apart.

• This leads to movement up the thermometer.
• because the temperature of the predicament is way on top of the area temperature the amount of mercury rises however once it's off from the beaker, the mercury level starts down as the temperature of the room is smaller amount than the temperature of hot water.
• Again, this development is continued after we place the thermometer in another beaker of 30° C and rises the mercury and stops at 30°C.

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