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Air The Excellent Canopy von Fahy, F (eBook)

  • Verlag: Elsevier Reference Monographs
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Air

We take it for granted, but without it we perish and if we continue to abuse it, it may kill us in the end. This fascinating text provides an understanding and appreciation of the role that air plays in our environment and its importance in relation to human life and technology. Aimed at those who are scientifically curious but who have no specialist training, it contains no mathematical equations and relies upon the qualitative descriptions and analogies to explain the more technical parts of the text together with simple home experiments to illustrate a range of air-based phenomena. Liberally illustrated with a range of line drawings and photographs, it recommends further reading for those who are motivated to learn more. This book offers invaluable background reading for both physics teachers and students. Provides an understanding and appreciation of the role that air plays in our environment and its importance in relation to human life and technology An introductory text for those who are scientifically curious but have no specialist training Delivers qualitative descriptions and analogies and simple experiments that illustrate a range of air-based phenomena
Frank Fahy University of Southampton, UK

Produktinformationen

    Format: ePUB
    Kopierschutz: AdobeDRM
    Seitenzahl: 136
    Sprache: Englisch
    ISBN: 9781782424345
    Verlag: Elsevier Reference Monographs
    Größe: 8595 kBytes
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Air

Glossary
Note: a number of the following words/terms have more than one definition. The ones given here relate specifically to the subject of the book
Ablation: melting and evaporation of material due to heating by friction

Acceleration: the rate of change of velocity (m/s2)

Amplitude: the maximum deviation from the rest value of a quantity undergoing simple harmonic variation (see 'Simple harmonic')

Angle of incidence (attack): the angle between the direction of motion of an aerofoil relative to the undisturbed air (or angle between the direction of the airflow approaching an aerofoil) and a line from the leading to trailing edges of the aerofoil

Angular momentum (of a body about an axis about which it rotates): the sum over the whole elements of a body of the product of the mass of each element, its velocity and the perpendicular distance to the axis of rotation

Boundary layer: a thin layer of fluid that covers the surface of a solid body that moves relative to the fluid and in which viscous forces and turbulence are dominant features

Celsius (Swedish astronomer): scale of temperature in which water freezes at zero and boils at 100 under specified conditions

Centre of curvature: the centre of a circle that passes through a point on a curved line of any shape, has the same curvature and is tangential to the curve at that point

Coefficient: a factor that defines a proportional relationship of one variable quantity to another

Contiguous: touching

Convex: curved outwards like the exterior surface of a ball

Decibel: a logarithmic measure of the temporal variation of sound pressure divided by a reference sound pressure

Diffraction: a property of waves whereby their pattern of propagation in a supporting medium is altered by the presence of 'foreign' bodies in the medium

Diffusion: spreading in all directions (especially by interaction between randomly moving particles of a fluid)

Dimensions (physics): fundamental physical quantities in terms of which all others may be expressed, e.g., mass, length, time. For example, from Newton's Law, force has the dimensions of mass (M) times acceleration. Acceleration has the dimensions of velocity/time (LT-1/T). So force has the dimensions MLT-2

Element: a very small region of fluid

Empirical: resulting from, or relating to, observation and experiment, not to theory

Energy (mechanical): a physical quantity that is a measure of the capacity to do mechanical work (see 'Work)

Equilibrium: at rest or undeformed

Even/odd multiples: 2,4,6, 8, .../1,3,5,7,..... times

Fatigue (mechanical): damage to the basic structure of a material by repeated reversal of applied force/stress ultimately causing failure

Fluid: any non-particulate material that flows

Fluorocarbons: chemical compounds of fluorine and carbon

Fractional variation: the variation of a quantity divided by its equilibrium or time - average value

Frame of reference (rectangular Cartesian): a set of three mutually perpendicular axes (like three edges of a room that meet at a point) by means of which the position of any point in space may be defined by the perpendicular distances of the point from the three planes defined b

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