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Bohr given a model for hydrogen molecule which is also applicable for some lighter atoms in which a one electron revolves around a stationary nucleus of positive charge Ze (known as hydrogen like atom)
Bohr's model is based on the following postulates.
(i) The electron can revolve only in particular discrete non-radiating orbits, named stationary orbits, for which total angular momentum of the revolving electrons is an integral multiple of
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A 15.2-kg police battering ram exerts an average force of 125 N on a 10.0-kg door. a. What is the average acceleration of the door? b. What is the average acceleration of th
2 moles of an ideal gas expand isothermally and reversibly from 50.0 dm 3 to 97.8 dm 3 at a temperature of 63.7 o C. (i) Calculate the entropy change for this process,
Synchronous motor can work at any power factor i.e. lagging, unity or at leading power factor. Synchronous motor when used to better the power factor only is known as " Synchronou
The stress at which the specimen breaks or reptures ultimately is known as ultimate strength. We also called this TENSILE STRENGTH .
Explain the term 'resolving power' of an astronomical telescope. How does it get affected on 1. Enhancing the aperture of the objective lens? 2. Enhancing the wavelength of t
composition of simple harmonic motion
A thermodynamic process, in which the volume of gas always same is known as isochoric process. In this process, the work completed by the body is zero. Therefore from first law
if a big person and a small person run up the stairs in the same time, which of them develops the most power
What is the definition of fringes
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