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How To Deliver Christmas Presents - クリスマスプレゼントの届け方


How To Deliver Christmas Presents(クリスマスプレゼントの届け方)

How To Deliver Christmas Presents In a future without chimneys

How To
For more questionable ideas for using science to solve problems, check out my new book, How To! Click on this comic or go to
 (科学を使って問題を解決するための更に疑わしいアイデアについては、僕の新本「How To!」をご覧あれ。このコミックをクリックするか、にアクセスして。)

Good Christmas gift!

作者: The traditional way to get Christmas presents into a house is to have a large reindeer-herding man slither down the chimney with them.

作者: Unfortunately, chimneys are becoming less common in the United States.

Disappearing chimneys
Percentage of new homes with fireplaces

作者: But that's OK; there are other ways to get a gift into a house
作者: Here are a few options!

1. Even without chimneys, houses aren't airtight. If you vaporize the gift, parts of it will enter the house through the intake vents...
...And it will stay there.

According to a 2008 study from Clarkson University, particles of your gift that settle in their house will remain there for an average of several months if they vacuum, and seven decades if they don't
Source: DOI 10.3155/1047-3289.58.4.502
 (出典:DOI 10.3155/1047-3289.58.4.502)

女: Seven decades?!
男: BRB, I need to go vacuum.
女: Houses are disgusting

2. The critical momentum necessary for a projectile to break glass is around 4 kg*m/s. (40 for ½" plywood.)
This means you can deliver a book-sized gift by hurling it at a window at 25+ mph
Speed = book mass/4kg*m/s = 25 mph
 (速度 = 本の重さ/4kg*m/s = 25 mph)
But if they've put up plywood shutters, you'll need 250mph+ delivery speeds.

3. Wait until they order a different book, then intercept the package, open the binding, and replace the pages with the ones from yours.

Cueball: ...Ugh, real-life content injection.
欄外の声: We need HTTPS for paper.
Alt-text: Building codes in hurricane zones rely on studies of how easily flying debris can break residential windows. If you're looking for a science fair project idea and you hate your neighbors, I'm sure they could always use more data!




2019.12.1 追記



 XKCDの作者、ランドール マンロー氏の著作本『ホワット・イフ?:野球のボールを光速で投げたらどうなるか』を紹介します。ウェブサイトに投稿された科学のおかしな質問を、XKCDばりの捻くれ方で回答し、それらを本にまとめたものです。こちらも面白いので是非に。

 この記事のカテゴリは、xkcd日本語訳(2019年) です。