You can create a dramatic propeller clock from some recycled propellers and a clock face you make from polymer clay. This aviation-themed clock would look spectacular in a pilot's den or recreation room, and would thrill a plane-obsessed youngster if hung on his bedroom wall. Clock hands, connected

Batteries produce electricity through a chemical reaction involving two metal plates and a substance called an electrolyte. In rechargeable batteries, this reaction can be reversed with electricity. Eventually, however, the battery can't hold enough energy anymore, and you'll need to replace it.

Agar is jellylike substance derived from purifying the cell walls of red algae. It is added to microbiological media for solidification purposes. It has no nutritional value, so when it is used in microbiology to culture microorganisms, various nutrients are added to increase bacteria growth in Petr

The root system of an oak tree extends out to the end of the tree’s branches, also called the drip line, and then travels approximately an extra one-third farther past this line. It is important to keep this area of the ground healthy and aerated to encourage the growth and maintenance of heal

Placing mementos on a board is a quick and convenient way to integrate a perpetually rotating series of keepsakes into your decor. While a bulletin board is an obvious choice, you should avoid sticking sharp pins in your mementos, which puts holes in them and makes them more susceptible to damage. Y

Science laboratories exist for almost any occupation. This is especially true for chemical, physics and biological research. However, other scientific laboratories serve for quality control purposes, such as food processing, metallurgy or the manufacture of pharmaceuticals. There are even laboratori

Electronic connectors that require wires soldered to contacts within in a small area present a problem. But cup solder contacts save space and allow room to make connections with less risk of burning the insulation on adjacent wires.

If you find commercial cell phone cases boring, create something that fits in with your personality. Making a cell phone holder from duct tape is a quick and simple craft that produces a stylish and amusing item. These holders may help cushion your phone if it falls and keep the surface from getting

Dimensional weight (also known as "volumetric weight") is the formula used by postal, shipping and courier services worldwide to calculate package shipping costs. Calculating this formula yourself before shipping a package gives you a good estimate of how much it will cost and doesn't require a scal

Jet fuel is mostly kerosene.air force plane image by JLycke from Fotolia.comJet fuel needs to be very clean in order to properly combust in the jet engine and produce enough force to propel the jet. A variety of different blends of jet fuel have been used as jet technology has developed,...

Calculating the resultant force on a body by a combination of forces is a matter of adding the different acting forces componentwise, as discussed in Halliday and Resnick's "Fundamentals of Physics." Equivalently, you perform vector addition. Graphically, this means maintaining the angle of the vect

Running on the tread mill delivers a force to the tread that is transmitted to the wheel, making it rotate some distance. If this wheel was connected to the shaft of a generator, it would spin, creating electricity. You are performing mechanical work on the wheel that is measured in joules. Mechani

Kindergarten is an ideal time to begin learning to read clocks since children need to begin telling time to prepare for certain parts of their day. Teaching time will help children anticipate when school starts, lunch is served and parents pick them up from school. If they know how to tell the time,

If you enjoy the deep melodic sound of wind chimes made from heavy brass pipes, you can easily make your own with a few simple tools and a little creativity. Hang your wind chimes in your garden or at your front entry gate for a welcome greeting to your guests. Combine other materials, such as cryst

The International System of Units, abbreviated to SI, is another appellation for the modern metric system. In that sense, to convert a metric unit to an SI unit requires a conversion of format and abbreviation to conform to proper SI usage. In addition, a number of older metric units are no longer i

Make your own uniique fridge magnets to share your personality.Decorative magnets of Prague image by TekinT from Fotolia.comCraft your own kitchen decor to add a piece of your personality to your home. Design a customized back splash, cover your fridge with magnets you have created...

Leather string can be used as shoelaces and braided to make crafts such as bracelets, lanyards and trim. Rather than buying leather lace from a craft store, you can use a lace cutter to recycle leather scraps into thin leather strings. Use garment-quality leather with no scratches or pits to make la

Climatology consists of forecasts (predictions) and solid reports depicted as static tables, graphs and lists or dynamic visual displays on satellite and radar maps. Weather reports are as informal as pilots logging weather to and from airports or technical data from satellite and radar provided vi

Hydroelectric power harvests electrical energy from the kinetic energy of moving water with a high degree of mechanical efficiency -- potentially approaching 90 percent. A high performance hydroelectric power system requires a high performance generator to keep energy losses in the apparatus low.

From the acacia to the yaupon, there are more than 130 tree species in Texas. Some are native to the various ecoregions of the state, such as the angelica tree and southern sugar maple. Others are relative newcomers, like the sawtooth oak. Some newcomers outstay their welcome and become invasive, fo