Joule
(a) The SI unit of energy, work, or quantity of heat. 1 J is equal to a force of 1 newton acting over a distance of 1 meter. 1 J = 107 ergs.
JOULE - Standard unit for energy. Another common energy unit is the calorie, which contains 4,184 joules. Dietary "calories" are actually kilocalories (103 calories) and are often written with a capital "C".
Joule
A basic unit of energy. A 1 Watt transmitter radiates 1 Joule of energy every second. Back to Top
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Joule (J)
A unit of energy roughly equivalent to the energy given up when an apple falls on the floor. Equivalent to the force of 1 Newton acting over a distance of 1 meter; 1 joule per second = 1 watt of power.
Jovian Planets ...
joule (J): A unit of energy equivalent to a force of 1 newton acting over a distance of 1 meter; one joule per second equals 1 watt of power.
Jovian planet: Jupiterlike planet with large diameter and low density.
Joule -- (pronounced like "jewel" or "jool"). Unit of energy: the ability to overcome one Newton along 1 meter (assuming g = 10 meter/sec2, it is also the energy required to lift 1 kg by 0.1 meters).
JOULE
A joule is the amount of work done by a force of one newton acting through one meter.
Joule per mole
The joule per mole is an SI derived unit of energy per amount of material. Energy is measured in joules, and the amount of material is measured in mole ....
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Joule's law can be combined with Ohm's law (V = RI) to produce two more equations:
and
where R is the electric resistance.
joules per kelvin
Overview
The wavelength is related to the frequency by ...
Joule (J ) - (n.)
unit for work in the MKS system of units: 1 J = 107 ergs = 0.239 cal.
Jovian planet - (n.) ...
A joule expended continuously for one second is a watt, which means a liter of water, converted to energy could power a 1 watt light bulb for 9 - 1016 seconds, or 2.5 - 1013 hours. Of course if it were a 100 watt bulb it would only burn for 2.
1 Joule = 1kg m2 s-2
A consequence of SI units is that the fundamental constants take on values that are not always convenient for including in equations: ...
3143 joules/degrees K-mol
The gas constant for a particular gas, specific gas constant, r = R/m where m is the molecular weight of the gas. See Boltzmann constant. gas constant per molecule (NASA SP-7, 1965) = Boltzmann constant.
6.6260755× 10-34 Joules second
electron mass
9.1093898× 10-28 grams
= 5.48579903× 10-4 amu ...
total energy 10 46 Joules (gravity origin)
energy emerges : 99% neutrinos, 1% kinetic, 0.01% light
neutrino burst detected from SN 1987A
light outshines galaxy for a week
fades with decay 56Co --- 56Fe (half life = 77 days) ...
1868 joules. See calorie. International System of Units (abbr SI) The metric system of units based on the meter, kilogram, second, ampere, kelvin, and candela. Also called MSKA system.
Week 139 - Mama Joules
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Week 132 - Steve's Astro Corner
Week 131- Starry Critters ...
Most of gravitational potential energy of the collapse gets converted to a 10 second neutrino burst, releasing about 1046 joules (100 foes). Of this energy, about 1044 J (1 foe) is reabsorbed by the star producing an explosion.
Even at this minimum velocity, the kinetic energy of a meteoroid would be 6 {times} 10 joules per gram of its mass. This can be compared with the energy of about 4 {times} 10 joules per gram produced by chemical explosives, such as TNT.
219 × 10-21 joule. An approximate value (1 in 104) for the energy of electromagnetic radiation expressed in electron volts is given by 1234 / , where is the wavelength in nanometres.
where E is the energy released (in units called Joules) from the conversion of a mass m (in units of kg), and c is the speed of light (in meters per second).
As noted in Chapter 3, the SI unit of energy is is the joule (J) (More Precisely 3-2). The value of Planck's constant is a very small number"6.63 10-34 joule seconds (J-s).
Heat and energy are measured in the same units (Joules). If we are thinking of a large group of objects which can exchange energy with each other, we usually think of this energy as heat.
5 x 1024 photons in total, with a total pulse energy of 3 x 105 joules, and 2 x 10-19 joules per photon. A one-metre telescope would need a slightly more intense beam, 2 x 10-18 joules per photon.
E = amount of energy produced by a given amount of mass, measured in Joules
m = mass that is converted into energy, measured in kg
c = speed of light, in this case 3.0 x 108 m/s ...
For example, the watt, W, is the SI derived unit of power. It is equal to joules per second. W = m2 ⋅ kg ⋅ s-3 (Note: the joule, J, is the SI derived unit for energy, work, or quantity of heat.) See also Units of Measure.
Definition: Watt: A unit of power, equivalent to one joule of energy per second.
Space Tragedies9 Planets in Nine DaysAstronomy 101
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This very small amount of energy is equal to 1.602 * 10-19 joules. Because an electron volt is so small, engineers and scientists sometimes use the terms MeV (mega-million) and GeV (giga-billion) electron volts.
For instance, a photon in the visible spectrum would contain an energy of approximately 4 X (10 to the power of -19) joules. Thus, a perfectly efficient 100-watt light bulb would emit approximately 2.5 X (10 to the power of 20) photons per second.
An electronvolt is a very small unit of energy, on the order of 1.602e-19 joules.
Temperature Measurement ...
a unit of energy equal to the energy gained by an electron that falls through a potential difference of one volt; 1.60 x 10^-19 joule
element ...
45 UTC on 4 July Tempel 1 caught up with the impactor and the two collided at a relative speed of 10.3 km per second, delivering 20 billion joules of kinetic energy into the impact or the equivalent of 4.5 tonnes of high explosive.
It probably survived nearly intact until impact, at which time it was pulverized and largely vaporized as its 6- 7 4 1016 joules of kinetic energy were rapidly dissipated. An explosion equivalent to some 15 million tons of TNT creates quite a bang! ...
 See also: Energy, Second, Light, Time, Field
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