Browsing Category
Hobbies & Science : Society & Culture & Entertainment
Types of Mathematical Relationships Between Two Variables
Variables can be related in various ways. Some of these can be described mathematically. Often, a scatter plot of two variables can help to illustrate the type of relationship between them. There are also statistical tools for testing various relationships.
Rigging Safety Tips
Safe rigging prevents injuries or damage to property.going up. image by Paula Gent from Fotolia.comRigging is used to lift heavy or large objects from the ground to work spaces above ground or to move them from one location to another. Because the objects or materials are so large and...
How to Clean a Mandrel Before Making Beads
Mandrels, used in lamp-working to create decorative beads, require cleaning after each use. Cleaning removes the bead release (also known as mandrel release) and any glass stuck to the metal. Bead release dust is dangerous to breathe, so clean the mandrels in water. Water also softens the bead relea
How to Kill Bugs on Bee Frames
Owning a bee colony is hard work, and it's made even more difficult by the fact that more insects from other countries have infiltrated the United States in the past 30 years. Removing insects and preventing them from interfering with the bee colony is no easy task, but as long as you monitor and ta
How to Measure kPa
Atmospheric pressure changes constantly due to altitude and weather patterns. Specialized instruments called barometers allow us to measure the amount of pressure that is being exerted by the atmosphere at that location. The mercury barometer is a widely accepted instrument for measuring atmospheric
How to Make a Medieval Spear
Medieval spears were just one part of the arsenal of weapons that knights and other fighters carried with them during medieval times. There are many different types of medieval spears, depending on what they were designed to do. The Spartan spear was a common design and simple enough to easily recre
How to Save Postage Stamps for Charities
Postage stamps are one of the most widely collected items in the world, and this means stamps -- new and used -- are worth money. The most valuable stamp in the world could be the Sweden 1855 Three Skilling Yellow, which sold for $2.26 million in 1996. There is also a market for the common stamps yo
What Wood Should I Use to Make a Fence Out of Tree Limbs?
Availability affects the kind of wood selected for a rustic fence made of fallen or pruned tree limbs. Although the types of wood used for such projects are endless, the number of choices in a yard is not. Also, the limbs of different kinds of trees present varying challenges and benefits. While s
How to Calculate Fan Power
Fan power measures how much electrical energy must be supplied to a fan to produce a certain amount of air flow. It is a function of air flow and air pressure, and is normally measured in units of horsepower. The calculation determines the theoretical power requirement for a fan, but the actual powe
How to Read a Graduated Pipet
A pipet is a hollow glass cylinder with a very small diameter used for measuring liquids. A graduated pipet has markings on the outside indicating volume. These markings are called graduations. Pipets are necessary for accurately measuring substances in scientific experiments. A liquid chemical is d
How to Determine Feng Shui Entry in a Basement Apartment
In feng shui, the ancient Chinese practice of creating life-enhancing living environments, a stairwell should never open directly into the entryway of a home. Basement apartments are often accessible from only one point, usually a stairwell leading down. Feng shui principles dictate that entryway co
How to Strengthen a Shelf
Incorrectly strengthening a shelf can result in bowing or breakage of the shelf. Bowing occurs when you overload a shelf with too much weight or create too long of a shelf that won't support much weight at all. Breakage occurs when the shelf itself breaks or when it pulls away from fixtures at its e
What Is a Weather RADAR?
A weather RADAR is a type of radar that detects clouds and precipitation in the atmosphere. Weather radars are used to locate and identify precipitation such as rain and snow, and have also been utilized to study and predict severe weather events.
Homemade Metal Detector Digging Tools
Metal detecting is a fun and fascinating hobby for the entire family. Although you will have to invest in a metal detector, several items you need to dig for hidden treasure you already have in your own home or can obtain for very little cost.
Conch Pots: How to Make
Conch shells are large sea shells. They have a spiral shape that creates an area that can hold potting soil. Large conchs can hold small plants or flowers, and would make an appropriate decorative pot for any beach-themed garden or landscape. You can also use them indoors near a window for houseplan
What Are the Dangers of a Lathe?
A lathe is used in both woodshops and machine shops. Before electricity, the lathe was only found in woodshops where it was used by wood turners to create table legs, bed posts and wooden bowls and plates. Today, lathes are used to create custom furniture, wood pens and in machine shops to cut custo
How Does Root Pressure Contribute to the Movement of Water Within the Plant?
Plants transport water from their roots upward to their trunks, branches and leaves through thin vascular bundles or tubes called xylem. Root pressure that "pushes" water upward can move a minimal amount of water a short distance. Transpiration, or "breathing," in plant leaves "pulls" far more water
Definition of Spherical Geometry
In mathematics, spherical geometry is the study of lines, angles and shapes on a spherical surface. Spherical geometry differs from the more familiar plane or Euclidean geometry in several important ways, mostly having to do with the behavior of lines and angles. Spherical geometry has a wide range
How to Make a Moving Toy Train
A moving toy train can be made using basic tools, and does not require a lot of woodworking experience. Wooden wheels and aluminum rivets can be purchased at most craft stores. Use quality, knot-free pieces of hard wo,od such as oak, ash or mahogany, to build the train. If the train is for a child t
How to Make a Mini Arrow
Scale miniature weapons are a staple of any battle model enthusiast or fantasy hobbyist who has a fascination with toy-sized representations. Realistic-looking miniature arrows are one of the more accessible types of homemade miniature weapons, requiring no metal shaping or complex moving parts. Cre