Which type of force causes surface tension?
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cohesive forces
The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension. The molecules at the surface do not have other like molecules on all sides of them and consequently they cohere more strongly to those directly associated with them on the surface.
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ᴄᴏʜᴇsɪᴠᴇ ғᴏʀᴄᴇs
ᴛʜᴇ ᴄᴏʜᴇsɪᴠᴇ ғᴏʀᴄᴇs ʙᴇᴛᴡᴇᴇɴ ʟɪǫᴜɪᴅ ᴍᴏʟᴇᴄᴜʟᴇs ᴀʀᴇ ʀᴇsᴘᴏɴsɪʙʟᴇ ғᴏʀ ᴛʜᴇ ᴘʜᴇɴᴏᴍᴇɴᴏɴ ᴋɴᴏᴡɴ ᴀs sᴜʀғᴀᴄᴇ ᴛᴇɴsɪᴏɴ. ᴛʜᴇ ᴍᴏʟᴇᴄᴜʟᴇs ᴀᴛ ᴛʜᴇ sᴜʀғᴀᴄᴇ ᴅᴏ ɴᴏᴛ ʜᴀᴠᴇ ᴏᴛʜᴇʀ ʟɪᴋᴇ ᴍᴏʟᴇᴄᴜʟᴇs ᴏɴ ᴀʟʟ sɪᴅᴇs ᴏғ ᴛʜᴇᴍ ᴀɴᴅ ᴄᴏɴsᴇǫᴜᴇɴᴛʟʏ ᴛʜᴇʏ ᴄᴏʜᴇʀᴇ ᴍᴏʀᴇ sᴛʀᴏɴɢʟʏ ᴛᴏ ᴛʜᴏsᴇ ᴅɪʀᴇᴄᴛʟʏ ᴀssᴏᴄɪᴀᴛᴇᴅ ᴡɪᴛʜ ᴛʜᴇᴍ ᴏɴ ᴛʜᴇ sᴜʀғᴀᴄᴇ.
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