Physics
The direction of heat flow between two objects depends on

Their temperatures
Whether they are in solid, liquid or gaseous state
Their heat contents
Their masses

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Physics
A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by

Increasing the radius of the capillary tube
None of these
Increasing the height of water in the vessel
Decreasing the radius of the capillary tube

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