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Science

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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…]

Using Mohr's Circle to Find Principal Stresses and Angles

Anyone in the mechanical sciences is likely familiar with Mohr's circle — a useful graphical technique for finding principal stresses and strains in materials. Mohr's circle also tells you the principal [more…]

Mechanics of Materials For Dummies Cheat Sheet

Students and professional engineers in the mechanical sciences know that mechanics of materials deals extensively with stress on objects — from determining stress at a particular point to finding stresses [more…]

Important Thermodynamic Equations and Formulas

Thermodynamics is filled with equations and formulas. Here’s a list of the most important ones you need to do the calculations necessary for solving thermodynamics problems. [more…]

Conversion Factors for Physical Measurements

Sooner or later, you’re going to have to convert from one unit of physical measurement to another. This list gives you some of the most common conversion factors you need in thermodynamics. [more…]

Physical Constants in Thermodynamics

You run across a few physical constants when working out thermodynamics problems. Following is a list of the constants you need when you’re working with potential energy, pressure, or the ideal gas law [more…]

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