By Robert L. Wolke
Realize how cricket chirps can let us know the temperature, why you cannot unburn a fit, why ice floats, and a bunch of mysteries of contemporary dwelling — together with a few riddles that perhaps even Einstein could not clear up. From the straightforward (How does cleaning soap be aware of what is airborne dirt and dust? How do magnets paintings? Why do batteries die?) to the extra complicated (Why does evaporation have a cooling impression? the place does uranium get its energy?), this booklet makes technological know-how extra comprehensible and fun.
Author Robert Wolke presents definitive and easy-to-comprehend motives for issues that we take with no consideration, just like the illumination at the back of neon symptoms and the mysteries of beverage carbonation. Wolke additionally dares readers to discover and behavior their very own experiments with meals, kitchen utensils, and customary loved ones items. This 15th anniversary version of his bestselling well known technology vintage has been thoroughly revised and improved.
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How fats Atoms drop a few pounds i will be able to take into account that coal and oil needs to include power, as the power comes out as warmth after we burn them. yet how will we get strength out of uranium? Does it burn? If through “burning” you suggest combustion—a chemical response with the oxygen within the air—no. but when you suggest do the uranium atoms get used up, convinced. You’re correct approximately coal, oil, and uranium containing power. truly, each substance features a certain quantity of strength. it truly is inherent within the targeted association of its atoms and the way they're held jointly.
The gizmo is not anything yet a pricey stopper. What you’ve pumped into the bottle is air, now not carbon dioxide. definite, there’s a bit carbon dioxide within the air, yet it’s in simple terms approximately one out of each 3 thousand molecules. The get away of a fuel from a liquid may be lowered merely via placing extra of that exact gasoline into the distance above the liquid. the volume of carbon dioxide that may remain dissolved within the soda relies in basic terms on what percentage collisions occur among carbon dioxide molecules and the skin of the liquid.
Once we burn coal or oil in air, we’re giving their atoms (along with a few oxygen atoms) a chance to arrange themselves into lower-energy combinations—carbon dioxide and water. we will be able to then acquire the liberated power as warmth. the one cause we can’t get power out of water or stone is that we can’t locate any lower-energy preparations in their atoms to assist them rework themselves into. a minimum of no longer with out expending extra strength than we’d come back. with the intention to convert themselves into lower-energy atomic combos, oil, typical fuel, and gasoline—all of our ordinary fuels—must be provided oxygen to react with.
I don’t desire an umbrella; I won’t soften within the rain. ”) yet melting, as you will have already famous, calls for warmth. you could definitely soften ice or sugar (see p. sixty three) through heating them, yet that’s now not what the salt does to the ice. The salt dissolves the ice. humans use the notice melting for the salt-on-ice phenomenon simply simply because they see ice disappearing and a liquid—salt water—remaining. And soften simply occurs to be the notice that our ancestors invented for “ice pass ’way, water come. ” technology academics and textbooks, besides the fact that, may still recognize larger than to fall into that linguistic seize.
What approximately that sterling silver tea tray that you simply inherited from Grandma? It’s ninety two. five percentage silver, and it'll paintings two times in addition to that overpriced chew of aluminum. A Foggy Day on the Bar i have to have opened millions of bottles of beer. (No comments, please; I’m a bartender. ) time and again, once I pop the cap, wisps of fog look within the neck of the bottle, and infrequently even blow his own trumpet above the hole. I’ve visible my proportion of foggy shoppers, yet what reasons foggy beer? The fog is precisely almost like any fog: a suite of tiny debris of liquid water which have been condensed out of the air via a chilly temperature, yet are too tiny to give way like rain.