B-4. A mercury thermometer is placed in a gravity free hall without to

1.	B-4. A mercury thermometer is placed in a gravity free hall without touching anything. As temperature risesmercury expands and ascend in themometer. If height ascend by mercury in themometer is h then bywhat height centre of mass of "mercury and thermometer" system descend?
Answer» Here thermometer is placed in gravity free region So there is no external force on the system when there is no force on the system its center of mass will retain its position and does not move if the whole system is initially at rest So here the displacement of center of mass of the system will be ZERO

B-4. A mercury thermometer is placed in a gravity free hall without touching anything. As temperature risesmercury expands and ascend in themometer. If height ascend by mercury in themometer is h then bywhat height centre of mass of "mercury and thermometer" system descend?

Answer»

Here thermometer is placed in gravity free region

So there is no external force on the system

when there is no force on the system its center of mass will retain its position and does not move if the whole system is initially at rest

So here the displacement of center of mass of the system will be ZERO