Have you ever wondered why some things heat up quicker than others? Or why some substances might take several minutes to get hot, while others only take a few seconds? It is well understood that as heat is applied to a substance in a single state, the temperature of the substance will increase. Experiments have […]
In scientific terms, “heat” is synonymous with energy and work. To explain heat, it is best to start small. All matter is made up of molecules. Molecules that contain heat energy are in constant motion. The speed of the molecular motion is directly related to the temperature of the matter. The faster, or more intense, […]
Simply defined, temperature is a measurement of the intensity of heat. “Intensity” is an important adjective to use when defining temperature. Everyone is familiar with things feeling “hot” or “cold”, but those terms are subjective and based solely on one’s perception of the intensity of heat energy. Temperature is measured using a thermometer. In the […]
While the pressure that the air exerts over the surface of the earth is approximately 14.7 pounds per square inch, most pressure gauges will read ‘0’ psi when open to the atmosphere. This is because pressure gauges measure a “relative pressure” compared to the surrounding atmospheric pressure. When a gauge is put on a tire […]
Because the air that fills our atmosphere has a weight, it also exerts pressure over the surface of the Earth. This pressure is referred to as “atmospheric pressure”, “air pressure”, or “barometric pressure”. At sea level, experiments have proven that the atmospheric pressure is 14.696 psi. Since the density of air decreases as the elevation […]
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