دانلود رمان انگلیسی “چه می شود اگر؟ 2”

I like ridiculous questions because nobody is expected to know the answer, which means it’s okay to be confused. I studied physics in college, so there’s a lot of stuff I feel like I’m supposed to know—like the mass of an electron or why your hair sticks up when you rub a balloon against it. If you ask me how much an electron weighs, I feel a little rush of anxiety, like it’s a pop quiz and I’m going to be in trouble if I don’t know the answer without looking it up. But if you ask me how much all the electrons in a bottlenose dolphin weigh, that’s a different situation. No one knows that number off the top of their head—unless they have an extremely cool job—which means it’s okay to feel confused and a little silly and take some time to look stuff up. (The answer, in case anyone ever asks you, is about half a pound.) Sometimes simple questions turn out to be unexpectedly hard. Why does your hair stand on end when you rub a balloon on it, anyway? The usual answer from science class is that electrons are transferred from your hair to the balloon, leaving your hair positively charged. The charged hairs repel each other and stick out. Except . . . why do electrons get transferred from the hair to the balloon? Why don’t they go the other way? That’s a great question, and the answer is that no one knows. Physicists don’t have a good general theory for why some materials shed electrons from their surfaces on contact while other materials pick them up. This phenomenon, called triboelectric charging, is an area of cutting-edge research. The same kind of science is used to answer serious questions and silly ones. Triboelectric charging is important to understanding how lightning forms in storms. Counting the number of subatomic particles in an organism is something physicists do when modeling radiation hazards. Trying to answer silly questions can take you through some serious science. And even if the answers aren’t useful for anything, knowing them is fun. The book you’re holding weighs about as much as the electrons in two dolphins. That information probably isn’t useful for anything, but I hope you enjoy it, anyway.