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Hobbies & Science : Society & Culture & Entertainment
Fast Mousetrap Car Instructions
Mousetrap cars are fun to build and can be an effective way to teach some principles of science. The typical mousetrap car is built from a spring-loaded mousetrap with a string connected to the rear axle. A mousetrap car can be built either to go fast over short distances, or to go long distances bu
How to Convert MPS to ARF
An MPS (Mathematical Programming System) file contains mathematical data programmed into a format useful for linear programming problems. MPS files are used in courses teaching advanced mathematics. To use them with Easy 4C Tutor (formerly known as Active Tutor), you need to convert them into an ARF
How to Build a Kiln Arch
It is nothing short of exciting when you see a brick arch that you have just built, supporting itself using nothing but gravity. The construction of such arches has shaped human history, as it allowed people to create huge, roofed stone buildings. The giant cathedrals in Europe are a prime example o
How to Solder a LED Light for Your PC
Proper soldering requires practice. Soldering a light emitting diode (LED) or any other device to a printed circuit board (PCB) takes skill and patience, especially on modern boards with tiny connections. You should not try it on your first attempt at soldering. Practice on something else first. Mis
How do I Grade a 1944 Liberty Half-Dollar?
The half-dollar struck by the U.S. Mint from 1916 to 1947 is often referred to as the walking Liberty, because it features Lady Liberty in stride on its face. The coin's reverse side features a bald eagle with its wings spread. Designed by Adolph A. Weinman, this coin is made of 90 percent silver an
Tumbleweed Crafts
Perhaps you're teaching about the features of the desert landscape, or maybe you're throwing a western-themed party; whatever the reason, you can easily create tumbleweed crafts to tie into the activity you are engaging in. With some basic supplies and a bit of creativity, you can craft those balls
How to Clean a Baritone Horn
Playing an instrument is hard enough, but if you don't properly clean your instrument, it can look tarnished and old in a short amount of time. A baritone horn is an instrument you should clean often and with care. You should not just use soap and water on instruments, as the brass, gold or silver n
How to Tie the Bow on Moccasins
Traditional moccasins, which were originally created by Native Americans, are now a modern and fashionable style of footwear. Moccasins are made of leather and are secured to the foot using a leather string. The string is tightened and then fastened in a bow, similar to tying laces for running shoes
How to Find the Correlation Coefficient for 'R' in a Scatter Plot
When scientists and mathematicians plot x,y data on a graph, they need to understand the extent to which the data values correlate to each other. That is, if the values of x between any two x,y data points increase, do the values of y increase by the same factor? To aid in this determination, the sc
Difference Between a Seismic Wave & a Tsunami
Violent, natural, environmental events underneath Earth's crust, underwater or above Earth's surface -- earthquakes, volcanoes, explosions -- can set off a series of shock waves that radiate outward from the source of the event. The shock waves may appear as either seismic waves or tsunamis, which a
How Does Lightning Affect the Earth?
Lightning refers to the discharge of electricity between oppositely charged particles jostled about in a thunderstorm or by heated air rising off a large fire or volcanic eruption. Coming in a variety of forms -- from cloud-to-ground strikes bridging earth and sky to sheet lightning dancing between
How to Apply Urethane Rubber to Nylon
Urethane rubber is a compound generally for the production of molds in industrial settings. The compound is mixed in two parts and is used because of its easy application, strength and resistance to abrasions. Before the urethane rubber can be applied to a nylon surface or mold, it must be properly
Tomy Micro-Pet Instructions
The original MicroPets are mini robots made by the Tomy toy company. These tiny electronic toys use voice recognition to follow simple commands and will talk, sing or play with you upon instruction. There are 10 MicroPets available in the original collection that play and interact with each other wi
How to Build a Miniature Room
There are many reasons to build a miniature room. Whether it's a school project, prototype for a real room or just because you enjoy making exquisite things, building miniature rooms is an engrossing and enjoyable hobby.
How to Make a Small PVC Piping Catapult
If you are learning about medieval war machines, you can experience the subject firsthand by creating your own machine out of hardware materials, such as PVC pipe. You can create a catapult out of PVC pipe that can actually be used to hurl objects across a distance. When finished, you can invite fri
What Is the Meaning of AC & DC?
Understanding alternating current (AC) and direct current (DC) is fundamental to understanding electricity. Direct current is a steady flow of electricity, as what you get from a battery. Most of the U.S. power grid runs on alternating current, which changes direction back and forth 60 times a secon
What Are the Dangers of Gray Wolves?
The big bad wolf, villain of many myths and fairybtales, was so feared that it was nearly hunted to extinction in many parts of the world. Governments would offer bounties on wolves and widespread trapping, poisoning and killing pushed the animals to the brink of obliteration. Though surely exaggera
How to Design Personal Wall Plaques
Personalized plaques are a good way to note a person's accomplishments, heritage or interests. You can make plaques yourself using wood and your imagination.
How to Locate Venus in the Night Sky
Locating the planet Venus in the night sky is usually not difficult. Venus is the closest planet to Earth, and it resides between the Earth and the sun. Therefore, after the moon, Venus is the brightest body in the night sky. Known as "the morning star" when seen just before sunrise in the eastern s
Stanley Plane Instructions
Stanley is a manufacturer of woodworking tools, including a popular line of block planes, also known as hand planes. A block plane is a hand-held tool which the user runs over the surfaces of a block of wood in order to level the entire surface, and remove any raised knots or bumps. While an easy to