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Q: Digging a hole from U.S. to China ( Answered ,   3 Comments )
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 Subject: Digging a hole from U.S. to China Category: Miscellaneous Asked by: sis9967-ga List Price: \$5.00 Posted: 14 Oct 2002 20:36 PDT Expires: 13 Nov 2002 19:36 PST Question ID: 76669
 `If you dig a hole from the U.S. to China would you come out head or feet first?`
 Subject: Re: Digging a hole from U.S. to China Answered By: robertskelton-ga on 14 Oct 2002 21:24 PDT Rated:
 ```Hi there, Thanks for the headache, but I think I have found an easy way to explain it. I have assumed that the digger is stupid enough to be male, and that he prefers standing upright when digging. The first thing you need to forget about is the idea of the hole being dug straight down from the US and arriving in China as a vertical hole. Although China is on the opposite side of the northern hemisphere, the opposite side of the globe is actually the Indian Ocean. The digging would be at an angle to the surface. It would be like digging a tunnel into a mountain, but at a very steep downward angle. At the start the digger would be digging at his feet, and would be going feet first into the hole. Halfway there the tunnel would be parallel to the surface and the digger would be standing upright and digging at a wall in front of him. As the digger approaches the surface of China, the tunnel will be at a steep angle again, but opposite to the original angle. The digger would be chipping away at the earth above him, and he would come out head first. It would be a very awkward angle to dig from, but not directly downwards. The digger will be on his feet the entire journey, but his feet will always be between his head and the centre of the earth. If you imagine that the hole was already dug, and someone in China climbed a few metres into the hole, and then climbed out again, how do you picture them climbing out? That is the way the digger will emerge. For a deeper understanding of this topic, I advise you to contact the Chinese government, who are currently interrogating a US boy who dug just such a hole: http://www.shotgunreviews.com/features/boydigshole.html A rabbit has also made the journey: http://www.pausd.palo-alto.ca.us/hays/Obermayr/SM/chinaadventure/HopperChina.html Search strategy: "hole to china" "upside down" ://www.google.com/search?q=%22hole+to+china%22+%22upside+down%22 Best wishes, robertskelton-ga```
 sis9967-ga rated this answer: ```Thanks for the answer. It was a Science question given to earn extra credit for an upcoming test.```

 ```The depth of the hole is unimportant. Most people climbing out of any hole would choose to emerge head first. It's hardly practical to emerge from a hole legs first. For one thing, you'd want to see what was up above.```
 ```While it is true that digging a hole through the center of the Earth from most of the USA will land you in the Indian Ocean, I recall reading that there is a small area of the USA that is directly opposite a small area of China. In any case, I agree that the only sensible way to dig would be to re-orient yourself so that your feet are always pointing "down." In theory you could keep your body in the same orientation all the way, and thus emerge feet-first, but standing on your hands and digging at the ceiling with you feet would be slow going!```
 ```The USA is in the northern hemisphere, so is china. If you are digging straight down(up) from the northern hemisphere you'll end up in the southern hemisphere. I'm pretty sure that the Xerox Parc Map viewer used to have an option to project both hemispheres onto a single surface, giving an fascinating view of what every point is opposite. Sadly it seems to have been withdrawn.```