Science
Exploring "Why" questions about Science
484 articles
why When a Tv is on and the screen is black why does the TV still emit light in a dark room? Even though the screen is black.
Televisions use back lights to send light through colored pixels to make images. When the TV is on the back light is on, even when no picture is being displayed.
why you can’t put metal in the microwave but nothing happens to the metal that it’s built from
You can put metal in microwaves, which is a lot come with racks, you just can't put metal with sharp edges/points such as forks and aluminum foil. As for the interior, most microwaves have their inter
Why do moths and other bugs like to crowd around light sources so much?
We think that moths use the moon/Sun for navigation. If you stand outside so that the moon is to your left, and walk keeping the moon to your left, you can keep a general heading. Moths developed this
Why are there no regulations on how bright headlights can be? (And if there are, why so bright?)
What you are talking about is people using HID bulbs in their headlights. This bulbs aren't designed to be used in most standard oem reflector headlight housings, they are supposed to be used in proje
Why is it so difficult to fall asleep without a blanket even when you aren’t cold?
People develop patterns for going to sleep. When you lie down, put your head on a pillow and cover yourself with a blanket your body thinks "ok, it's time to go to sleep" because you've trained it to
Why are red, green and blue the primary light colours; but cyan, yellow and magenta are primary paint and ink colours?
Red + Green + Blue = White light. None of them = black (absence of color) With printing you are using white paper. Which means you don't need to make white.
Why does 90 degree heat feel hot while a 90 degree swimming pool feels amazing?
Because water conducts heat (and cools you down) more efficiently than air. Your normal body temperature is around 98.6 degrees, and the main way the body cools itself is through evaporative cooling w
Why is radiation so damaging as it is?
You are a very complex controlled chemical reaction. Ionization causes different reactions and products than are supposed to be inside you.
Why is it when oil prices go up gas prices immediately go up but when oil prices come down the price of gas never comes down as fast as when the price of oil increases?
On TV, when the price of gas goes up, they say they have no choice but to sell it higher in gas stations too. But when the price goes down, they say that they had already bought a lot of gas when it w
Why is fire used to make land fertile? Wouldn’t the heat from the flames cause a dust bowl effect?
Fire is GOOD for nature for many reasons; you may have heard that coniferous trees (trees with cones) will only spread their seeds when the heat from a fire melts the resins in the cones and allows th