Category: Physics

What is the most geologically active moon? Io Are geologically active areas? These boundaries, the danger lines described in the SAVAGE EARTH program “Hell’s Crust,” are the most geologically active regions on Earth. Through decades of observation and experiment, scientists have developed a picture of Earth’s interior and the forces that produce the violent activity […]

How much gold is in a cell phone? There are 0.034 grams of gold in each cell phone, according to the U.S. Geological Survey. That’s the equivalent of 0.001 troy ounces, worth about $1.82 at today’s prices. There are also 16 grams of copper, worth about 12 cents, 0.35 grams of silver, worth 36 cents, […]

What ingredient makes a cake rise? Leaveners Why is cream of tartar used in angel food cake? Cream of tartar, a byproduct of wine and grape juice processing, is an acidic salt that acts as a stabilizer in recipes that require whipped egg whites, such as meringue, angel food cake, and soufflé. The longer the […]

What is the power of white noise? White noise is a CT stochastic process whose PSD is constant. Signal power is the integral of PSD over all frequency space. Therefore the power of white noise is infinite. No real physical process may have infinite signal power. What is an example of white noise? White noise […]

What color is pure iron? gray Is pig iron pure? Traditionally, pig iron was worked into wrought iron in finery forges, later puddling furnaces, and more recently, into steel. These are high purity pig irons and depending on the grade of ductile iron being produced these pig irons may be low in the elements silicon, […]

Do mirrors enlarge things? Reflection from a Plane Mirror The image distance always equals the object distance. The size of the image is the same as the object (the mirror does not magnify the image). Does mirror make room look bigger? Use mirrors If you’ve ever wondered, “Do mirrors make a room look bigger?” the […]

What happens to the resistance of a light bulb as the filament gets brighter? A filament lamp is a common type of light bulb. It contains a thin coil of wire called the filament. This heats up when an electric current passes through it, and produces light as a result. The resistance of a lamp […]

¿Cómo era Juanito en el país sin punta? Juanito Pierdedía era un gran viajero. Viaja que te viaja, llegó una vez a un pueblo en que las esquinas de las casas eran redondas y los techos no terminaban en punta, sino en una suave curva. A lo largo de la calle corría un seto de […]

How do you reset a 12 volt battery? Mix ¼ Epsom salt with ¾ warm distilled water. You need a quart of this mixture for one cell. Pour the mixture into the cells and shake it around before letting it sit. Connect the charger for the battery and charge for 12 hours. Can dead batteries […]

Can yelling affect my unborn baby? A calm and stress-free pregnancy is best for all concerned but now a new study suggests that partners who yell at a pregnant woman could be doing lasting harm that goes beyond the mum-robe’s own mental well-being. How can I make my pregnant wife happy? 10 Things You Must […]