Joule, James unit

Jeffryes, Alec, 628 Joliot, Frederic, 517 Joliot-Curie, Irfcne, 248 Joule The base SI unit of energy, equal to the kinetic energy of a two-kilogram mass moving at a speed of one meter per second, 135,635 Joule, James, 199... 

Joule James Prescott (1818—1889) Brit, eng. who quantilled heat liberated upon the electric passage through resistance, unit joule named after him Kamerlingh-Onnes Heike (1853—1926) Dutch phys., obtained liquid helium, found uperconductivity of mercuiy, studied magnetic and optical properties at low temperatures... 

In any process, we are interested not only in the direction of heat flow but also in its magnitude. We will express q in the units introduced in Chapter 6, joules and kilojoules. The joule is named for James Joule (1818-1889), who carried out very precise thermometric measurements that established the first law of thermodynamics (Section 8.7). 

Work, heat, and energy can be expressed using various units. The metric unit for energy is the joule, abbreviated J. The joule was named in honor of the English physicist James Prescott Joule (1818-1889). 

The SI energy unit (kg m2)/s2 is given the name joule (J) after the English physicist James Prescott Joule (1818-1889). The joule is a fairly small amount of energy—it takes roughly 100,000 J to heat a coffee cup full of water from room temperature to boiling—so kilojoules (kj) are more frequently used in chemistry. 

James Prescott Joule determined the equivalence of heat energy to mechanical work in the 1840s by carefully measuring the heat produced by friction. Joule attacked the caloric theory and played a major role in the acceptance of kinetic molecular theory. The SI unit of energy is named after him. 

The unit for work is the Joule (J), named for the British beer brewer and private scholar James Prescott Joule, who lived in Manchester, England, in the nineteenth century. One Joule corresponds to the product of the units of force (Newton, N) and length, N m = kg m s. ... 

The SI unit for energy is the joule (pronounced jool ), J, in honor of James Joule (1818—1889), a British scientist who investigated work and heat 1 J = I kg-m s. Equation 5.1 shows that a mass of 2 kg moving at a speed of 1 m/s possesses a kinetic energy of 1 J ... 

The joule is the SI unit of work or energy. One joule is the amount of work done when an applied force of 1 newton moves through a distance of 1 meter in the direction of the force. It is named after the English physicist James Prescott Joule (1818-89). 

The SI unit of work done is the newton metre or joule (symbol J). The joule is the preferred unit and it commemorates an English physicist, James Prescott Joule (1818-1889). 

Joule ju(9)l also -E jau(o)l [James P. Joule] (1882) (J) n. The SI unit of work and energy, equal to 1 Nm, that replaces a variety of not-quite-equal older joules as well as numerous calories, all of which equal 4.18-4.19 J. Six different British thermal units are all about equal to 1055 J. Serway RA, Faugh JS, Bennett CV (2005) College physics. Thomas, New York. 

James Prescott Joule measured the increase in temperature when rubber was stretched in 1859. William Thompson (Lord Kelvin) was one of the few natural philosophers (scientists) to recognize the importance of Joule s investigations. He developed an equation for quantifying Joule s discovery in 1857. Units for temperature and energy have been named after these polymer pioneers. 

Electrical Energy. The quantitative relationships between heat, electrical energy, and mechanical energy are cornerstones of any branch of electrical theory and practice. So basic were the investigations of these relationships carried out by James Joule (1818-1889) that his name is given to a unit (usual symbol, J). 

Joule The standard unit of work that is equal to the work done by one newton of force when the point at which the force is appHed is displaced a distance of one meter in the direction of the force. The joule is named for the English physicist James Prescott Joule (1818-1889). 

Watt The unit of power equal to the work done at one joule per second, or the rate of work measured as a current of one ampere under an electric potential of one volt. Designated by the symbol W, the watt is named after the Scottish inventor James Watt (1736-1819). 

The modern notion of heat stemmed from the experiments conducted by James R Joule in 1850. He placed known quantities of water, oil, and mercury in an insulated container and agitated the fluid with a rotating stirrer. The amount of work done on the fluid by the stirrer and the temperature changes of the fluid were accurately recorded. He observed that a fixed amount of work was required per unit mass for every degree of temperature raised on account of stirring. A quantitative relationship was established between heat and work. Heat was recognized as a form of energy. 

The SI unit of energy is the joule (J), named for the physicist James Joule. The joule is a fairly small quantity of energy. It is the amount of kinetic energy possessed by a 2-kg mass moving at a speed of 1 m/s. 

Correctly, the joule is used as the unit of energy. The joule is an SI unit, named after James Prescott Joule (1818-89), who first showed the equivalence ofheat, mechanical work and other forms of energy. In biological systems, the kilojoule (kj = 10 J = 1000 J) and megajoule (1 MJ = 10 J = 1,000,000 J) are used. 

As implied in the brief illustration, the SI unit of energy is the joule (J), named after the nineteenth-century scientist James Joule, who helped to establish the concept ofenergy (see Chapter 1). It is defined as 1 J = 1 Nm = 1 kgm s". A joule is quite a small unit, and in chemistry we often deal with energies of the order of... 

The unit of heat is the Joule, mentioned previously. The Joule was named for James Prescott Joule, the famous English physicist. His development of Joule s Law, which related the amount of heat prodnced in a wire as proportional to the resistance of the wire and the square of the current, led to the thermal unit being named for him. The Joule is also used in Charpy impact tests, where an impact hammer is dropped from a specified height to impact a sample. The force is in Newtons, which is at a specified height in meters (or millimeters), and the energy that impacts the metal specimen is N m or Joules. Refer to Figure 1.1, which shows a Charpy impact test machine. 

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