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Suppose two deuterons must get as close as 10^-14 m in order for the nuclear force to overcome the repulsive electrostatic force. The height of the electrostatic barrier is nearest to Suppose two deuterons must get as close as 10^-14 m in order for the nuclear force to overcome the repulsive electrostatic force. The height [...]

The ratio of the speed of the electron in the first Bohr orbit of hydrogen and the speed of light is equal to (where e,h, and c have their usual meanings in cgs system) and c have their usual meanings in cgs system) H The ratio of the speed of the electron in the first [...]

1. In Fig. 6.13, lines AB and CD intersect at O. If angle AOC + angle BOE = 70° and angle BOD = 40°, find angle BOE and reflex angle COE. 1. In Fig. 6.13 find angle BOE and reflex angle COE. lines AB and CD intersect at O. If angle AOC + angle BOE [...]

Transitions between three energy levels in a particular atom give rise to three spectral lines of wavelengths, in increasing magnitudes, lemda 1, lemda 2, and lemda 3. Which one of the following and lemda 3. Which one of the following in increasing magnitudes lemda 1 lemda 2 Transitions between three energy levels in a particular [...]

Example 3 : Consider the following statement : There exists a pair of straight lines that are everywhere equidistant from one another. Is this statement of direct consequence of Euclid’s fifth postulate? Explain​ 2. Give a definition for each of the following terms. Are there other terms that need to be defined first? What are [...]

Given: mass number of gold = 197, density of gold = 19.7 g/cm^2, Avogadro’s number = 6 * 10^23. The radius of the gold atom is approximately: Avogadro's number = 6 * 10^23. The radius of the gold atom is approximately: density of gold = 19.7 g/cm^2 Given: mass number of gold = 197 October [...]

Example 2 : Prove that an equilateral triangle can be constructed on any given line segment. Example 2 : Prove that an equilateral triangle can be constructed on any given line segment. October 15, 2020 Category: Chapter 5 - Introduction to Euclids Geometry , Maths , NCERT Class 9 ,

An electron jumps from the fourth orbit to the second orbit of hydrogen atom. Given: the Rydberg’s constant R = 10^5 cm^-1. The frequency, in Hz, of the emitted radiation will be An electron jumps from the fourth orbit to the second orbit of hydrogen atom. Given: the Rydberg's constant R = 10^5 cm^-1. The [...]

Example 1 : If A, B and C are three points on a line, and B lies between A and C then prove that AB + BC = AC. and B lies between A and C then prove that AB + BC = AC. B and C are three points on a line Example 1 [...]

2. Does Euclid’s fifth postulate imply the existence of parallel lines? Explain. 2. Does Euclid’s fifth postulate imply the existence of parallel lines? Explain. October 15, 2020 Category: Chapter 5 - Introduction to Euclids Geometry , Maths , NCERT Class 9 ,