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Hobbies & Science : Society & Culture & Entertainment
How to Open the Safe in the Game Lighthouse
Lighthouse: The Dark Being is an adventure/puzzle game developed and published by Sierra Online in 1996. It has been released for DOS, Macintosh and Windows operating systems, though it may not be compatible with modern computers due to its age. Near the beginning of the game, you encounter a safe.
Osteoprogenitor Cell Definition
While most active during bone growth, osteoprogenitor cells reactivate to repair bone fractures in adults and may become osteoblast cells during bone remodeling. From stem cells to progenitor cells to osteoprogenitor cells, osteoprogenitor cells transform into additional cells in order to develop an
How to Make Things Out of Deer Antlers
After your successful deer hunt, you now have your prized rack of antlers and you are not sure what to do with them. Whether your spouse refuses to let you hang "Bambi's" head on the living room wall, or you spent your allotment on the hunt alone, you still have options to preserve the antlers so yo
Great Ideas for an Invention Convention
An invention convention is a meeting of the minds for fledgling inventors. It's an opportunity to exhibit your invention to the public and trade ideas with other inventors. Schools often have them as a complement to science fairs. Adults, too, participate in invention conventions. No...
How to Adjust Pinewood Derby Wheels
Building a pinewood derby car is an enjoyable father and son activity, usually done once a year when a boy is a Cub Scout. When building the car, you add weights that will bring the car up to a specific weight limit. It is crucial that weights are balanced in the middle of the car or it will not go
How to Paint a Solar System in a Bedroom
Many boys and girls go through a period of intense interest in outer space. The planets in the solar system is often a favorite subject of children. You can cultivate or encourage that interest in science and space by painting a solar system bedroom. This is a project that you can complete on your o
Advantages & Disadvantages of Walk Through Metal Detectors
Metal detectors are used to find metal objects on persons or in packages. Coils within a metal detector create a small electromagnetic field that reverberates against metal objects. When the coils reverberate from the metal, a computer or microprocessor alerts the security personnel that there is me
Steps of Cell Respiration
Redox ReactionsDuring a redox reaction, energy is transferred from one molecule to another through the transfer of electrons. When a molecule loses electrons, it is losing energy and said to be oxidized. When it gains electrons, it is gaining energy and said to be reduced. (You can...
How to Traverse Binary Trees in Java
Binary trees are complex data structures used in computer programs to store data in memory using a common storage algorithm. By using this type of algorithm, data can be stored in a stable pattern, making retrieving and searching through data easier. Java programmers who are designing binary trees a
Directions for Adding Vectors
A vector is a quantity that has both a magnitude and a direction. Drawn on a graph, a vector looks like an arrow. The length of the arrow represents the magnitude of the vector, and the direction of the arrow represents the direction of the vector. Vectors can be added graphically or mathematical
Types of Old Fountain Pens
Old fountain pens came in a variety of types. Unlike most modern pens, these pens could be re-filled. Beyond that, fountain pens could include safety features to contain the ink, thermometers for doctors, steel wire for writing tips and even ink cartridges instead of refillable barrels. Many of thes
How to Use a Slot Car Slide Guide
The guide is the most important part of your slot car. Treat it with care.
The Causes of Smog
Smog poses an environmental health hazard.the smog of cairo image by Elmo Palmer from Fotolia.comSmog, a portmanteau of smoke and fog, is a common sight hanging over large cities. Smog is blamed in air pollution deaths, respiratory disease and an increasing number of asthma cases, and...
How to Identify an Original Colt M-16 Rifle
The M-16 rifle is standard issue in the United States military and in many of the NATO countries. It appeared on the scene in 1964, when the US Air Force adopted it to replace their aging inventory of M-1 carbines. The original M-16 was an experimental design based on the AR-15. When finally deliver
How to Program a 6 Channel RC Transmitter
Only the most complex radio-controlled vehicles require a 6-channel transmitter to function properly. For the most part, these transmitters are used by helicopter and airplane enthusiasts who want their aircraft to exhibit exceptional maneuverability. However, no matter how powerful the radio system
How to Set Barometers
Barometers are instruments that measure atmospheric pressure. The pressure is shown in the barometer's dial, and is usually represented in inches. While they are fairly accurate devices, you need to set one properly to get a good reading. The atmospheric pressure differs in locations based on elevat
How to Paint Foam Planes
Remote controlled cars and planes are popular additions to the collections of many model enthusiasts. Part of the enjoyment of collecting remote controlled planes is painting them in decorative colors, but foam structures can often present adhesion or absorption difficulties. However, an effective p
About the Law of Definite Proportions
The Law of Definite Proportions is a scientific law discovered by Joseph Proust. It states that the composition of chemical compounds is proportionate regardless of the size of the sample. Though the principle has been found to be non-universal in the past 50 years due to increased testing capabili