what do you understand by the seconds pendulum
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✨ᴀ sᴇᴄᴏɴᴅs ᴘᴇɴᴅᴜʟᴜᴍ ɪs ᴀ ᴘᴇɴᴅᴜʟᴜᴍ ᴡʜᴏsᴇ ᴘᴇʀɪᴏᴅ ɪs ᴘʀᴇᴄɪsᴇʟʏ ᴛᴡᴏ sᴇᴄᴏɴᴅs; ᴏɴᴇ sᴇᴄᴏɴᴅ ғᴏʀ ᴀ sᴡɪɴɢ ɪɴ ᴏɴᴇ ᴅɪʀᴇᴄᴛɪᴏɴ ᴀɴᴅ ᴏɴᴇ sᴇᴄᴏɴᴅ ғᴏʀ ᴛʜᴇ ʀᴇᴛᴜʀɴ sᴡɪɴɢ, ᴀ ғʀᴇǫᴜᴇɴᴄʏ ᴏғ 0.5 ʜᴢ.❤
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