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How Does the Earth Revolve?

How Does the Earth Revolve?

The revolution of the Earth is the movement of the Earth around the sun. When the solar system was forming, the dust and rock was spinning around a central core. As the planets and moons coalesced, the planets continued to revolve around the sun in the same manner.......[Read More]
List of Ingredients in Perricone MD Cold Plasma

List of Ingredients in Perricone MD Cold Plasma

Perricone MD Cold Plasma contains a number of common cosmetic chemicals.progesterone - gestagene image by Cornelia Pithart from Fotolia.comPerricone MD Cold Plasma is an anti-aging cream with three dozen ingredients. The cream purportedly took five years of research and development to.........[Read More]
Dark Repair Mechanism Vs. Light Repair in DNA

Dark Repair Mechanism Vs. Light Repair in DNA

DNA has many repair pathways. One must occur in the light, and several can occur in the dark. These mechanisms are distinguished by whether the enzymes required to perform the actions obtain their energy from the sun.......[Read More]
How to Make a Radio Jingle

How to Make a Radio Jingle

Creating radio jingles can be a good way for songwriters to make money. Local radio stations are a good place to start as they will usually source production music from a library; if you can provide original, memorable jingles for them they are unlikely to turn you down.......[Read More]
Pros and Cons of Once-through Cooling Water Systems

Pros and Cons of Once-through Cooling Water Systems

Once-through cooling impacts the environment in several ways.Kachemak Bay image by Robert Ulph from Fotolia.comOnce-through cooling water systems (also known as open-loop cooling) use water via a heat exchanger to draw heat from a source then discharge the heated water. The alternative.........[Read More]
How to Calculate Light Pole Base Size

How to Calculate Light Pole Base Size

Bases of light poles are circular in shape. Determine the size of the light pole base by calculating its area in square inches. This can be done even if the base of the light pole is inaccessible because the pole is upright. Finding the circumference, or distance around, the base allows determinatio......[Read More]
How to Sync Live Data on "Uncharted 2"

How to Sync Live Data on "Uncharted 2"

"Uncharted 2" is an exclusive video game title available only on the PlayStation 3. When you play using the online multiplayer mode, your "Live Data" includes a list of all the treasures you have found and all the points you have scored, among other things. Syncing "Live Data" involves making sure t......[Read More]
How to Calculate Rocket Nozzle Size

How to Calculate Rocket Nozzle Size

The performance of a chemically propelled rocket is largely determined by size and geometry of the engine and the conditions present in the combustion chamber. If one assumes, however, that the flow of propellant through the engine as a whole is isentropic (not taking entropy losses into account), t......[Read More]
How Rheostats Work

How Rheostats Work

Rheostats and ResistanceA rheostat is a simple variable resistor with two contacts. A resistor is a device designed to resist the flow of electricity. The more resistance an electronic current encounters, the more slowly that current flows. By increasing or decreasing the resistance in a.........[Read More]
How to Adjust a 1911 Novak Sight

How to Adjust a 1911 Novak Sight

The M1911 is a semi-automatic handgun. It was developed in 1911, but is still used by police, military personnel and civilian shooters. Modern 1911s are available with upgraded sights that are more accurate and easier to aim than older models. Novak's was one of the first companies to offer upgraded......[Read More]
Famous Chemical Spills

Famous Chemical Spills

A chemical spill is any unintended release of a chemical into the general environment. Unfortunately, there have been many chemical spills throughout the course of history, but several of these stand out from the others and have become particularly notorious. This is partly because of the sheer size......[Read More]
Effects of Floods

Effects of Floods

Floods occur worldwide, often after heavy rains in an area over an extended period. Floods may come about slowly or can happen in a flash. Once the flood waters clear away, they leave behind a variety of different effects on the land, animals and people. While many people view flooding as having a s......[Read More]
How to Attach a Launch Controller to a Model Rocket Engine

How to Attach a Launch Controller to a Model Rocket Engine

Model rocketry is considered by many to be an exciting and exhilarating hobby. In order to facilitate a successful rocket launch, the model rocket and its engine must be securely and firmly connected to the launch controller leads. This document will explain how to safely connect the launch controll......[Read More]
How to Connect Horseshoes

How to Connect Horseshoes

A horseshoe is a hoof-covering metal plate worn by horses to protect them from injury. Horseshoes are crafted by blacksmiths in all sizes, from pony to saddle horse, and are usually made from steel or aluminum. Metal is heated and hammered into a U-shaped design and the cooled resulting horseshoe is......[Read More]
Pythagorean Theorems in Math

Pythagorean Theorems in Math

The Pythagorean theorem is based on a right triangle. Right triangles include three angles, one of which must equal 90 degrees. As with all triangles, right triangles must be three-sided and the addition of all three angles must equal 180. The longest side is called the hypotenuse. The other sides a......[Read More]
How to Make a Compass for Cutting

How to Make a Compass for Cutting

A standard hand-held compass is sufficient for making small circles, but when a project calls for a larger circle you must make a larger compass. With a few supplies and basic woodworking tools, you can make a custom compass that is easy to use and accurate. The same technique can be used to create ......[Read More]
Little Tikes Playhouse Instructions

Little Tikes Playhouse Instructions

You have just bought or received a Little Tikes playhouse. Your child is likely to love this gift, just make sure you have some time to put it together, and a partner to help with the roof and other assembly. Don't cut it short on time as there are a lot of production steps and you don't want anythi......[Read More]
How Does Weathering and Temperature Affect Rocks?

How Does Weathering and Temperature Affect Rocks?

Rocks can be worn away or weathered by a variety of means. Chemical weathering occurs when rocks are degraded by chemical reactions. There are also a wide variety of forms of physical weathering, including a number due to the effect of temperature. Types of physical weathering occurring as a result ......[Read More]
What Causes Wind-Driven Currents?

What Causes Wind-Driven Currents?

What are Currents?A current is defined as a large mass of ocean water that is in constant motion. Among the currents in the five oceans are the well-known California Current, Gulf Stream, North Atlantic, Atlantic South, Equatorial and the Westwind Drift (according to Greene, Thomas F..........[Read More]