Thermal energy is represented in Joule units nowadays because of James Prescott Joule, the man who discovered that heat is actually an energy sort. He was an English physicist, studying relationships involving temperature, heat, and perform when he produced the discovery. In the course of his testing he realized that simply agitating the water mechanically would raise its temperature.
Thermal energy is most simply defined in the context of the excellent gas , which is well approximated by a monatomic gas at low pressure. The excellent gas is a gas of particles viewed as as point objects of great spherical symmetry that interact only by elastic collisions and fill a volume such that their imply free path involving collisions is much bigger than their diameter.
The salinity values represented on the map are offered on the practical salinity scale (PSS) which is primarily based on the ratio of the electrical conductivity of the seawater sample to a common resolution of KCl, both at 15 °C and one atmosphere stress. A ratio of specifically 1 corresponds to 35 on the scale, which is almost precisely 35 ppt salts. The salinities are commonly lower close to the poles, exactly where melting ice dilutes the saline seawater, and higher nearer the equator, exactly where evaporation increases salinity.
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In an 1847 lecture entitled On Matter, Living Force, and Heat, James Prescott Joule characterized various terms that are closely associated to thermal energy and heat. He identified the terms latent heat and sensible heat as types of heat each effecting distinct physical phenomena, namely the potential and kinetic energy of particles, respectively. 10 He describes latent power as the power of interaction in a offered configuration of particles, i.e. a kind of possible energy , and the sensible heat as an energy affecting temperature measured by the thermometer due to the thermal energy, which he referred to as the living force.