多少气球才能让房子飞起来多少个气球能让房子飞起来 _小知识

文章插图
The conceit of the new Disney/Pixar cartoon epic, Up, is that an old guy's house gets attached to a bunch of helium balloons which lift it up out of the city and on a wonderful adventure.
迪士尼的新卡通史诗电影《飞屋环游记》的奇特之处在于，一位老人的房子挂在一堆氦气球上，这些气球把它抬出了城市，展开了一场奇妙的冒险。
That got Wired Science thinking: Could that actually work? And if so, how many balloons would you need?
这就有了一个奇怪的科学问题：这样真的行得通吗？如果可以的话，那需要多少个气球呢？
We called Wolfe House Movers, which specializes in moving old structures and had Kendal Siegrist, a manager, take a look at the images from the movie to see how much the house might weigh.
我们打电话给专门搬运旧建筑的Wolfe House Movers公司，让经理肯德尔·西格里斯特(Kendal Siegrist)看电影中的图片，看看房子有多重。
"A building like that, you'd figure right around 100,000 pounds," Siegrist said.
Siegrist说：像飞屋中的屋子，最好是计算成100000磅
Then we did some calculations. Air weighs about 0.078 pounds per cubic foot; helium weighs just 0.011 pounds per cubic foot. A helium balloon experiences a buoyant upward force that is equal to the air it displaces minus its own weight, or 0.067 pounds per cubic foot of helium balloon.
【多少气球才能让房子飞起来多少个气球能让房子飞起来】然后我们做了一些计算。每立方英尺空气大约重0.078磅；每立方英尺氢气只重0.011磅。一个氢气球受到向上的浮力，这个浮力等于它替换的空气受到的重力减去氢气自身受到的重力，也就是0.067磅每立方英尺。【注：1英尺=0.3048米 1磅=0.454千克】
One more simple calculation — 100,000 pounds divided by 0.067 pounds per cubic foot — and you've got that it would take 1,492,537 cubic feet of helium to lift the house. Of course, you'd need some more balloons to keep getting it higher, but that's our minimum.
再做一个简单的计算——10万磅除以每立方英尺0.067磅——你就会得到，需要1492537立方英尺的氦气才能抬起房子。当然，你需要更多的气球来保持它的高度，但这是我们的最小值。
Now, let's assume you've got a bunch of spherical balloons three feet in diameter. They've got a volume in 14.1 cubic feet, so you'd need 105,854 of them filled with helium to lift the house. Eyeballing the cluster of balloons above the house in Up, let's say on average, it's 40 balloons across and deep and 70 balloons tall. Do the math and there could be 112,000 balloons in there.
现在，假设你有一堆直径为3英尺的球形气球。它们的体积为14.1立方英尺，所以你需要105854个充有氦气的容器来提升房子。把房子上方的气球群往上看，平均来说，它有40个气球宽，深，70个气球高。算算一下，里面可能有112000个气球。
"That's a great idea," Siegrist said, laughing. "I'd love to do that with the balloons."
这是一个好的想法，siegrist笑着说，我很愿意用气球这么做。
Cluster Ballooning fans actually do this sort of thing, but with people in harnesses, not enormous houses, and they generally use a lot less balloons. They tend to use bigger balloons, say, six feet in diameter. You'd only need 13,208 of those.
气球爱好者们事实上做过这种事情，但是一般都是把人们套上束缚带，而不是巨大的房子，而且他们通常是使用少数的气球他们打算去使用更大的气球，听说是直径6英尺的气球。你只需要13208个气球。
But even if you could get the balloons and one hell of a strong cable, could a house be pulled from the top like that?
但即使你能找到气球和巨结实的缆绳，房子真能从顶端像电影里那样被拉起来吗？
"If you go try picking it up, depending on what you're doing, you can," Siegrist said, "but for the most part, you want the house to bear the weight on its foundation."
如果你尝试把它提起来，你能做到，但通常你要让房子承受它本在地基上的重量。

多少气球才能让房子飞起来 多少个气球能让房子飞起来

多少气球才能让房子飞起来多少个气球能让房子飞起来