Meldrik@lemmy.wtfM to TerrifyingAsFuck@lemmy.wtf · 5 个月前How deep is that cave?!lemmy.wtfvideomessage-square8linkfedilinkarrow-up169arrow-down11
arrow-up168arrow-down1videoHow deep is that cave?!lemmy.wtfMeldrik@lemmy.wtfM to TerrifyingAsFuck@lemmy.wtf · 5 个月前message-square8linkfedilink
minus-squareCarvexlinkfedilinkarrow-up23·5 个月前Nerdier math puts the 14 second total time as 12s falling and 2s sound returning, for a depth of 700m. Your napkin was fairly close!
Nerdier math puts the 14 second total time as 12s falling and 2s sound returning, for a depth of 700m. Your napkin was fairly close!