query: What causes surface tension actually?
positive_passages.docid: 21603
positive_passages.text: Why is surface tension parallel to the interface?
negative_passages.docid: 95946
negative_passages.text: What causes the expansion of space?
negative_passages.docid: 107533
negative_passages.text: Origins of Tension
negative_passages.docid: 106988
negative_passages.text: What does really attracts a water stream to a charged object?
negative_passages.docid: 81912
negative_passages.text: What causes a force field to be "non-conservative?"
negative_passages.docid: 36773
negative_passages.text: Why do wet objects become darker?
negative_passages.docid: 117433
negative_passages.text: Why do hydraulic jumps form?
negative_passages.docid: 36690
negative_passages.text: Buoyant force when object is between two liquids
negative_passages.docid: 103284
negative_passages.text: Why does a bubble take a spherical shape?
negative_passages.docid: 32113
negative_passages.text: Tension on a massless string
negative_passages.docid: 112961
negative_passages.text: Why does water pouring from a glass sometimes travel down the side of the glass?
negative_passages.docid: 67656
negative_passages.text: Intrinsic vs. extrinsic properties of surfaces
negative_passages.docid: 114699
negative_passages.text: Is there a physical reason for level repulsion and avoided crossings?
negative_passages.docid: 6608
negative_passages.text: Why do rain waves form and what is their connection to the texture of the surface they're on?
negative_passages.docid: 58089
negative_passages.text: What really goes on in a vacuum?
negative_passages.docid: 97921
negative_passages.text: Microscopic interpretation of pressure in liquids
negative_passages.docid: 33676
negative_passages.text: Internal and external forces