Neutron by emission of positron and a neutral particle of negligible mass

Neutron by emission of positron and a neutral particle of negligible mass

 In the above reaction, proton is converted into neutron by emission of positron and a neutral particle of negligible mass called as neutrino, v. It cân be shown that if Z is the atomic number of daughter nucleus, the 1 difference in coulomb energies of mirror nuclei is equal to (6ze2 4TE0 5R where R is the radius of the daughter nucleus.

 This energy is spent by providing rest mass energy m.c? to produce a positron of mass me, imparting a kinetic energy Eg+ to B* particle and providing rest mass (m, - mp)c required for converting a neutron of larger mass, mi, to a proton of smaller mass, mp 6Ze2 5R + mc? + (m, - mp) c The experimental value of kinetic energy, E, imparted to B"-particles in the case of mirror nuclei can be used tó estimate R. The average value of R found by this method is (1.23 + 0.03) xA3 x 10 m. (ii) Mešonic X-rays The nuclear radius can also be estimated from the energies of X-rays emitted by mu-mesons which are called mesonic X-rays.

. The methods c field due mu? 4TEGR 2e x Ze Ze R = or Substituting the typiçal values for Z = 20, m = 6.64 x 1027 kg, e = 1.6 x 10-1 Coulomb and velocity v 10' m/s, R will be approximately equal to 1.5 x 10-14 elastic scattering of a-particles from nuclei with Z varying from 29 to 90 as equal to 1.35 XA X10- m. R was also estimated equal to (1.2±0.1) m.

 The average value of R has been estimated from the x 10- m from the life-time of radioactive alpha emitters obtained from Gamow's theory of a-decay by barrier penetration. The following typlcal methods have been generally 'used for an estimation of nuçlear radius, X A3 (i) Mirror Nuclei Method The mirror nuclei are pairs of nuclei which are obtained from each other by exchange of neutron with proton, e.g. H' He', 3Li' Be', C3, 19K 20Ca etc. A mirror nucleus like N is unstable and gets converted Into C3 by emitting B* (e*) and v as follows.

Intrinsic Properties Rutherford's experiment

Intrinsic Properties Rutherford's experiment

Constituents of Nucleus and Their Intrinsic Properties Rutherford's experiinent on the scattérii falpha particles by métallic foils wàs aimed at estimating the distance of closest approach of an alpha particle nearest to the inner core of the atom, i.e. the atomic nucleus: It.was possible to estimate the. size of an atomic nucleus from the Coulomb repulsive force between an alpha particle of positive charge approačhing the atomic core of positive charge when these' are separated by the shortest distance.

 It was conclusivèly proved that the central core of an atom consists of a nucleirs which is approximately spherical in shape with rádiuš varying between To 12 and 10 1 cm having a net positive charge. Prior to the discovery of neutron, proton-electron hypothesis was proposed on the basis of which the atohmic nucleus was considered to be composed of protons and electrons. was assumed that electrons and protòns were present within the nưcleus XA which will have A protons and Z electrons pre-existing within the nucleus.

 It çould, account for mass and charge of the nucleus and explain B emission by nuelel but could not explain other properties: The electron-proton hypothesis of nuclear structure was rejected because it was contradictory to the experimentally observed nuclear properties. It was after the discovery of neutron by Chadwick as a párticlé with mass of about 1.67 × 1027 kg nd equal to that of a proton but without any charge.

Severny's theory has not emerged as fuli proof in magnetic field

Severny's theory has not emerged as fuli proof in magnetic field

 

 high gradient of fields. In fact, substantial modifications in the magnetic field structure are actually observed in the flare region after the flare has died out. Moreover, large magnetic field gradient is capable of accelerating particles to high energies which can subsequently emit radiation in wavelengths ranging from X-rays to long radio waves, as are actually observed in flares. But there are other observations of magnetic fields which Severny's cannot explain, and so Severny's theory has not emerged as fuli proof.

 A plausible theory of the origin of flares has also been proposed by Gold and Hoyle. Their theory relies for the energy source on coalescing and cancellation of two bundles of twisted magnetic lines of force. They imagine a filament consisting of a bundle of lines of force which emerges from a point in the photosphere and re-enters ät another point thus forming an arch.

 This bunch of lines of force may be twisted due to highly  In order that this energy may be released abruptly, a pair of such fil ments with initial magnetic fields in opposite directions but the same sense of twisting is hypothesized. Two such filaments placed close to each other will attract each other, interpenetrate, and a part of the field will be annihilated in a time-scale of the order of 10 seconds.convective motion in the subphotospheric layer.

 The energy density of this convective mass motion is 10 erg em only a few per cent of which is associated with flarë phenomena. The twisting of the field can greatly increase the intensit, of the initial moderate field. Calculation shows that an amount of magnetic energy equal to - 100 filament. This is the right amount of energy that is involved with flare phenomena.

stares are the most energetic phenomena of highly transient nature

stares are the most energetic phenomena of highly transient nature

Stares are the most energetic phenomena of highly transient nature occurring in the Sun. While observing the Sun on spectroheliograms or filtergrams, sometimes the chromospheric emission lines, particularly the H and K Ca II lines originating in the sunspot and surrounding clage regions are observed to brighten up intensely within a few seconds or minutes.

 Such corcurrences are known as flares. The intensity of emission lines increases as much as four to five timies of those originating in plages within a few minutes, and sometimes within only 10 res. (for microflares). The strengths of lines then decay raher slowly within a time interval of 10 to 100 minutes.

 A very large flare can also be observed in the white light of the Sun when it appears as an intense bright spot against the continuous background of the spectrum of the surrounding solar disc. Flares are believed to originate in chromosphere but rise far up into the lower corona.

 They have a tendency to occur near the complex groups of spots and usually the occurrence is repeated many times in the same place. Occasionally, they are seen to occur when a spot group is rapidly developing. Some of these have also been observed to occur from the umbrae of large full-grown spots with complicated magnetic field structures.

 These observations clearly associate ilares with sunspot activity. Flares are classified according to their brightness and the areas covered by them. The area seems to be more important criterion of classification because usually, the larger the flare the brighter it is and with longer lifetime.

Types of sure collaboration

TPYES OF SURE COLLABORATION

Types of sura collaboration.  • India's first 50-meter long tunnel Aquarium will be built in Surat.  • The Supreme Court will review the verdict in Article 377 of the Penal Code.  • Dinosaur eggs are found in Moawada village, Balasinor, Najike of Mahisagar district; • Formation of Padmavat Granth.  E.  Q.  In 1540, in the Khapri language, Chalpi style was made by Malik Muhammad Pasi.  • Government of India has planned to celebrate the year of 2018 as the national Jwarwar year.  Be shocked  • Classical dance festival of the year 192 held at Modhera Suryamandir. • Government of India launches the Queenic suggestions to give the number of cities to II6.  • On being appointed chairman of the Gujarat Co-operative Milk Marketing Federation, Ramsinh was appointed.  Lalu Prasad Yadav has been sentenced to jail for felony and scandal.  Quiet of terse

Neem is a deeply rooted, medium-sized, evergreen green, medium-fast, and fastest growing tree in favorable conditions.  This tree in India is very common.  Because its native hometown is South Asia.  It is also nice in very short-lived regions.  Dhuvantri Nigantak describes three varieties of neem.  1, Neem (or bitter neem) 2.  Buckam Neem and 3  Sweet neem  The first of which is of the same clan. 

 The third is a neem tree of lemon.  All parts of neem are bitter, they are all useful.  Some are naturally interested in the very old neem tree.  Which is known as neem tray.  However, such interest does not flow from every tree.  Neem can be raised from 50 meters to 1500 meters above sea level.  This tree is 450 to 12000 m  M  Until the rain is good.  According to one raw, estimate, there will be 18 lakh neem trees in the country.  More than 5 lakh metric tons of seeds, more than one lakh metric ton oil and more than four lakh metric tons of bud are used every year of Neem.  And even though we use 25-30% of the total amount of the total production.  This will explain why this is a very important tree.

Gujarat's forest resources in best collaboration

Gujarat's forest resources in best collaboration

 • According to the India State Forest Report- 2015 released by the Union Ministry of Environment and Forests, total area of ​​Gujarat is 1,96,244.  Lie  M  From 14,653 sq.  Lie  M  The forests are located in the area.  7 of the area of ​​Gujarat.  48%.

  • In Gujarat, 376 sq.  Lie  M  Dense forests, 5, 220 sq.  Lie  M  Medium thick  Forests and 9, 057 sq.  Lie  M  Open forests lie.  1, 492 sq. In Gujarat  Lie  M  There are shrubs in the area, but they are not counted in the forests.  If it is counted then the area is 16, 145 sq.  Lie  M  In terms of percentage and 8  23% occurs.  .

 • Total 4, 628 sq. In the country  Lie  M  The area lies in the Mangrove forests.  |  In the states having mangrove forests, Gujarat has 1, 103 sq.  Lie  M  Second, with 2, 097 sq.  Lie  M  West Bengal is in the first place.  Magnav forests are located in 13 districts of Gujarat.  Kachchh district in the districts of 789 sq.  Lie  M  The largest mangrove forest in the area is the forested district.

 • Annexation Policy was prepared in the year 1988 by the Government of India!  And 33% of the country's forests have been established to establish forests, but due to continuous harvesting of forests and the introduction of religious knowledge, the states and union territories together in 15 states together account for more than 33% of the forests.  .  - 14, 653 sq.  Lie  M  With the forest area of ​​8, 358 sq.

  Dishonest area.  If counting with forests and trees, it is 11 percent in terms of percentage.  74 percent.  who officiate in the most match in Indian first-class cricket, is the statue of Lord Shiva, the world's largest lord, appointed at Nathdwara in Rajasthan.  Women's Warfare Boxing Championship: Mariecock became the world's first boxer to win a medal.  With the help of Russia, India will make two 

Corrosive Bleaching (TB) is a sensitive and worrying environment

 Corrosive Bleaching (TB) is a sensitive and worrying environment 

 • Corrosive Bleaching (TB) is a sensitive and worrying environment in terms of environment.  At the same time, it is a sign of environmental change, the symbol of climate change.  Construction of masonry walls is not processed for a few months, the velocity is ready after decades.  Due to this, the ready-to-run sea water biodiversity centers are similar.  If this tidal wall becomes depleted (i.e. it gets erosion), then the ocean variations and nutritional levels can get disturbed.  So, let's understand that whistle bleeding is called and how the circulatory system is formed.  Moving is a living creature.

  Zoosanthella, which has a variety of colors, is receiving secure accommodation in the composition of its calcium.  The zucchini mosses are different colors, and the motile is also visible in different colors.  In the two millenniums, mosses get food from moss and safe for safe havens and motifs.

  • This symbiosis causes only the biodiversity of the ocean.  But when there is a change in the environment around the mausoleum, such as the temperature of the water increases, the salinity of the water (the saline) increases or the polluted water absorbed in the ocean or if the sunlight is blocked by the deposits of plastic or oily substances on the ocean surface, obstruction in mucus and moss symbiosis occurs in such conditions.  As a result, zuzayethili leaves the trail or dies.  As a result, the color of glaucoma disappears and the glaze becomes bleached and becomes white, which is its original color.