51动漫

In the book The Hitchhiker's Guide to the Galaxy, the Vogons demolished Earth. They said it would take approximately 2 minutes, so how much energy would they have needed to obliterate our planet? Would kicking the planet out of its orbit have been more energy efficient than simple destruction?

I can usually make sense of my kitchen radio, even if someone else is talking or the phone is ringing. This isolation of a single noise among others is known as the "cocktail party effect". However, just crumpling the bag inside a cereal packet renders any other sound unintelligible. Why?