Types of Cloud
Clouds play a large role in discussing, predicting, and watching the weather — not to mention providing scope for daydreams and flights of fancy. The following list describes the common cloud types that [more…]
Weather For Dummies Cheat Sheet
Who doesn’t talk about the weather? But, if you know the meanings of some key weather words, you can talk even more fluently. And clouds provide scope for imagination and help in predicting and anticipating [more…]
Symbols Used in Electronics Projects Schematics
If you get involved in electronics projects — building radios or metal detectors or motion detectors or whatever — it helps to know the symbols used in schematics. The symbols in the following list are [more…]
Safe Soldering Checklist
If you’re tackling an electronics project, you’re tackling soldering as well. Soldering poses a few different dangers: The soldering iron itself gets mighty hot; the solder [more…]
Types of Switches Used in Electronics Projects
A switch seems simple enough: You flick it one way to go on and the other way to go off. With an electronic project however, understanding how different types of switches operate helps you decide which [more…]
Electronics Projects For Dummies Cheat Sheet
Electronics projects often start with schematics that tell you what type of electronics to use where. Getting familiar with the symbols used in schematics takes you from “what the heck does this mean?” [more…]
Anatomical Body Cavities
Medical shows and crime shows have made body cavities all too familiar, and anatomically speaking, these spaces are very important, providing housing and protection for vital organs. The following list [more…]
Anatomic Organ Systems
If you’re talking anatomy and physiology, you’re talking about the human body and its organs. The 11 systems in the following list provide the means for every human activity from breathing to eating to [more…]
Describing the Anatomic Position
To describe or talk about human anatomy, you need to start from an agreed-upon view of the human body. The anatomic position for the human form is the figure standing upright, eyes looking forward, upper [more…]
Anatomic Terms
When you’re talking anatomy in a scientific way, everyday words such as front, back, side, above, and below just aren’t precise enough. Instead you use the anatomic terms in the following list: [more…]
Anatomical Planes of the Body
You may not think about the planes of your body much, but you have them nonetheless, and if you’re talking anatomy, knowing the names of the planes comes in handy. [more…]
Anatomy & Physiology For Dummies Cheat Sheet
The human body is a beautiful and efficient system well worth study. In order to study and talk about anatomy and physiology, you need to be familiar with standard anatomic positions and anatomic terms [more…]
Chemical Bonding Basics
In bonding, atoms lose, gain, or share electrons in order to have the same number of electrons as the noble gas that's nearest on the periodic table. Ionic, covalent, and metallic bonds are formed by combinations [more…]
Chemistry Concepts: Energy Levels and Orbitals
A lot of chemistry is explained by the sharing and trading of electrons between atoms. Understanding how electrons are arranged in an atom is a building block of Chem I. [more…]
Digging the Mole Concept in Chemistry
The mole (abbreviate mol and sometimes called Avogadro's number) is a conversion number that allows a chemist or chemistry student to move from the microscopic world of atoms, ions, and molecules to the [more…]
Identifying Isotopes through Representations
In Chem I, you may have to identify isotopes, which are atoms of the same element that have different numbers of neutrons. The following representation allows you to identify a specific isotope of an element [more…]
Common Measurement Conversions for Chemistry
In order to succeed in your Chem I class, you need to have a firm understanding of basic chemistry measurements and how to convert them from one measurement to another. Following are some important conversions [more…]
The Basic Chemistry of Acids and Bases
A lot of chemistry requires you to understand the difference between acids and bases. An acid is a substance that donates an H+ ion to another chemical species called a base. A [more…]
The Combined Gas Law and Ideal Gas Law
When studying the properties of gases, you need to know the relationships between the variables of volume (V), pressure (P), Kelvin temperature (T), and the amount in moles [more…]
Chemistry For Dummies Cheat Sheet
During the first year of high school chemistry or the first semester of college chemistry, all the terms, units of measurement, and atoms, molecules, elements, and compounds may seem a bit overwhelming [more…]
How to Measure the Distance to the Moon Using Trig
One of the earliest applications of trigonometry was in measuring distances that you couldn’t reach, such as distances to planets or the moon or to places on the other side of the world. Here’s an example [more…]
Formulas for Calculating Stress at a Point
When dealing with mechanics of materials, choosing the correct formula to calculate the stress at a given point can be difficult. Normal and shear stresses come in a wide variety of applications, each [more…]
Basic Mechanics of Materials: Computing Stresses in Columns
Knowing how to compute the stress in a column (compression member) is a basic point of knowledge in mechanics of materials. Determine if the column is ' short, slender, or intermediate by computing its [more…]
Using a Generalized Hooke's Law for Stress and Strain
In mechanics of materials, Hooke's law is the relationship that connects stresses to strains. Although Hooke's original law was developed for uniaxial stresses, you can use a generalized version of Hooke's [more…]
Mechanics of Materials: Calculating Deformations from Loads
Deformations measure a structure's response under a load, and calculating that deformation is an important part of mechanics of materials. Deformation calculations come in a wide variety, depending on [more…]
