General Physics: Mechanics and Molecular Physics

Abstract

The book covers a very wide area of physIcs in what the authors call an aUmpt "to acquaint the reader with the principal phenomena and most important laws of physics". However this acquaintance can hardly be deep or critical for the book of 372 pages has somethmg to say about a rather wide vanety of topics. Naturally enough oDe misses very often a discussion or mathematical treatment which can in any sense be called complete. Yet if anybody hkes to have an idea of say classical mechanic-ii, classical field theory, the crystalline symmetry and lattices, the kinetic theory, the laws and approach of thermodynamics, the electrol~tes, chemical reactions and surface phenomena, transport properties) plasticity and elastidty, and '\Ilseosny (well, here there are II. few pages on supcrftuldity even) in one smgle sman volume then here is that unique combmatlon and he Will also ha'\lc a flavour of the lucldity, and orIginality which has characterised the now famous series of texts by Landau and Lifshitz. ThiS book Wilt not serve as a text book for any course in our universities but will be a pleasant reading Qutstudy book for undergraduate sludents In Physics and Chemistry and will help in clanfyinB thclC Ideas,

Cooperative self-organization of microorganisms

“…In general [224], marginal stability occurs when q 1ˆq2 (referred to as`case I' ) or when the amplitude of the part decaying more rapidly (say A) vanishes (referred to as`case II' ). Ben-Jacob et al provided the following example :…”

Resuspension and redistribution of radionuclides during grassland and forest fires in the Chernobyl exclusion zone: part II. Modeling the transport process

“…It is assumed that all moisture will be evaporated, which reflects the experimental results (Yoschenko et al, 2006). This is described with the second term, q(1 ÿ Dry)M S S t , where q denotes the energy for the evaporation of the moisture from the fuel mass unit, J kg ÿ1 , which is calculated using the specific heat for water, 4200 J kg ÿ1 K ÿ1 , and the specific evaporation heat, 2.26 Â 10 6 J kg ÿ1 (Landau et al, 1969):…”

“…Obviously, considering the resuspended radioactive particles of ash, resin, water and non-burned rests of the fuel material, we have to take into account their sedimentation due to the gravity force, mg. On the other hand, the Stokes resistance force also acts on the moving particles. This force is expressed as (Landau et al, 1969) …”

“…where the index exp is used to indicate the experimental values at the observation point k. C P (J kg ÿ1 K ÿ1 ) Landau et al (1969) 1006 r e at 293 K (kg m ÿ3 ) Koshkin and Shirkevi (1975) 1.3 h (kg s ÿ1 m ÿ1 ) Landau et al (1969) 1.8 Â 10 ÿ5 T e ( C) Yoschenko et al (2006) 22.3 16.2 26.5 1/P (dP/dz) (m ÿ1 ) Landau et al (1969) 1.14 Â 10 ÿ4 C W Kochin et al (1963) 0.9 C Bruyatsky (2000) 0.24 J (J kg ÿ1 ) Dusha-Gudym ( The measured airborne concentration A V is the ratio of the total sampled activity A at the filter during the sampling period (fire duration) T to the sampled air volume V. At the sampling rate n, m 3 s ÿ1 , the sampled volume is nT. Assuming that the burning time of the elementary rectangle is t i , which causes the airborne concentration A Vi in the observation point, and taking into account that t i /T is equal to the ratio of the elementary rectangle area Dx i Dy i to the total fire area S, we can see that…”

On the relative density of clouds

“…The concept of osmotic pressure is common in physics (e.g. Landau and Akhiezer, 1967) and complex fluids literature (e.g. Brady, 1993).…”