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All measurements you make have some uncertainty in them. If you measure a distance of 14.5 inches with a ruler, for example, you don’t know for certain that the distance was exactly 14.5 inches, because your eyes and the ruler…
The Plantae kingdom is one of five kingdoms in the Linnaean classification system – the other four kingdoms being Monera, Protista, Fungi and Animalia. Many kingdom Plantae members you are familiar with live on land (terrestrial plants), while others, like…
Normality expresses a concentration of a solution. It is abbreviated by the letter N. Normality is defined as the gram equivalent weight per liter of solution. Understanding Equivalent Weight In order to solve a normality calculation, equivalent weight must be…
Ions in chemistry can be a single charged atom, or they can be a group of atoms that act as an ion. These groups of atoms are called polyatomic ions. Polyatomic ions each carry a specific charge, which is determined…
In order to measure distances and locations on the Earth’s surface, scientists use a system of imaginary lines called latitude and longitude. Longitude runs north and south and is used to measure distances that are east and west. Alternatively, latitude…
Have you ever looked at something large and non-living, like a battle tank or a small commercial airliner, and wondered how much it weighs? If so, how did your mind go about trying to even guess? Did you think of…
Standard cubic feet per meter (SCFM) is one of several ways to formally describe the flow rate of gases. SCFM measures how much of the matter that makes up a gas (or mixture of gases) passes through a given region…
To aid in the study of weather and other phenomena, scientists use thermometers to measure temperature. Thermometers come in various different types including liquid-in-glass, resistance and infrared radiation. Each type offers different advantages such as cost, speed, precision and temperature…
Stress is the amount of force per area on an object. The maximum stress that an object is expected to support is called the allowable stress. For example, the floors in a library might have an allowable stress of 150…
While cone-bearing trees, or conifers, all belong to the same plant group, they aren’t actually all pine trees, nor are they all evergreens. The familiar Christmas tree might be what comes to mind when you think of cone-producing trees, but…
