What's the definition and equation of the mechanical efficiency of the machine? What is the efficiency of the machine that miraculously converts all the input energy to useful output energy? A 59% efficient device uses chemical energy to generate 490 J of electric energy. A second device uses...
Josiah Williard Gibbs, an American mathematician and physicist, developed the concept of free energy. The method of free energy proposed by him is now widely known as Gibbs free energy. In the year 1873, his publication “Graphical Methods in the Thermodynamics of the Fluids” introduced a simpl...
u b)From the result of part a),find the Stephan's constant(σ)which is defined as P=14cU-=σT4, wherePis the radiated power per unit volume. c)After convertingu( u)in equation(1)to a function ofλ,...
Bandgap is the energy difference between the bottom of the conduction band and top of the valence band. It’s a space in which no electron states are occupying. Silicon and germanium are extensively used semiconductors. The energy band gaps of silicon and germanium are 1.1 eV a...
4. Yeah, oddly enough sometimes normal is normal. Sometimes we can't see why normal isn't normal. 是啊,说来也是奇怪,有时候没有异常就属于正常,可有时候我们搞不明白为啥没有异常也不能算正常 5. - Whoa, you're letting me touch the markers ...
What is the efficiency equation? What is the general formula for energy? What is the power output of an engine the does 60,000 J of work in 10 s? What is meant by a power diagram? Name the physical quantity which is measured in (a) kWh (b) kW (c) Wh ...
A hydrogen atom is in a state with energy -0.278 eV . In the Bohr model, what is the angular momentum of the electron in the atom, with respect to an axis at the nucleus? A hydrogen atom in the ground state is placed in a magnetic field of strength Bz = 0.55 T. (A...
It is an open question whether the Leray-α model has a similar derivation to that of an averaged equation. In Constantin (2001), however, another ... A Cheskidov,DD Holm,E Olson,... - 《Proceedings of the Royal Society A Mathematical Physical & Engineering Sciences》 被引量: 319发表:...
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If you go through each phase of this scenario and totaled up the energy for the system, you will find that the amount of energy for the system is the same at all times. In the next section we'll look at the properties of light. Light Light is a form of energy, and exists in ...