Questions and answers curated from Reddit's
"Explain Like I'm Five" community:
- Why do batteries placed next to each other need to have their ends swapped?
- ANSWER: "When using multiple batteries, you're generally going to use them in series (with the positive terminal of one battery connected to the negative terminal of the next battery), rather than in parallel. Having batteries in series adds their voltages together, whereas having them in parallel allows for more current draw at the same voltage as a single battery. Anyway, since you're connecting the batteries in series, having adjacent batteries flipped just uses less wire." - /u/AnteChronos
- Why are carpenter's pencil's rectangular?
- ANSWER: "The lead doesn't break as easily, it's easier to sharpen with a knife than a round pencil, and probably most importantly you can set it down and it doesn't roll away." - /u/AssholeSalad
- Why does raw steak have blood, but raw sashimi does not?
- ANSWER: "Raw steak actually doesn't have a lot of blood. The red juice in a steak is water and myoglobin. Fish don't have (much) of it, which is why you don't see it. Neither does pork or chicken for that matter." - /u/djc6535
- How can New Horizons send back detailed pictures of Pluto when we dont even have a stable internet connection on Earth?
- ANSWER: "New Horizons doesn't use the same network as the internet. There is a series of large radio telescopes around our planet known as the Deep Space Network, which are used for the purpose of communicating with probes a long distance from earth. Given the distance of New Horizons, it has line of site to almost half of earth at any given time, so as long as there is a radio telescope in this area (they are placed so there always is) it will be able to communicate with earth." - /u/bounding_star
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