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**Q. **who has higher surface tension soap solution or water?

This is because plain tap water has higher surface tension, so the surface is "stronger" and can hold together a larger drop. Adding soap lowers the water's surface tension so the drop becomes weaker and breaks apart sooner.

**Q. **pressure kaun so quantity ha? Vector or scaler?

Pressure Scalar hai

**Q. **A drop of water of mass m = 0.4 g is placed between two clean glass plates, the distance between which is 0.01 cm. If the force needed to hold one of the plates is 3.2x N, find ‘x’. (Surface tension of water = 0.08 N/m).?

put force (F) = mg