Momentum, Heat, and Mass Transfer Fundamentals
... momentum flux . 16 Momentum " runs down the velocity gradient " as a consequence of the second law of thermodynamics much as water runs downhill ; i.e. , flows from regions of higher velocity to regions of lower velocity . It therefore ...
Angular Momentum in Quantum Mechanics
... momentum of a classical mechanical system composed of two parts , each having an angular momentum whose magnitude and direction are well defined , is easily obtained . It is given by the vector L which is the resultant of the addition ...
Energy Momentum Tensors
... MOMENTUM TENSORS ASSOCIATED WITH RIEMANNIAN METRICS 19 1 . Introduction 19 2 . Divergence Differential Operators 20 3 . Energy - Momentum Tensors 27 4 . 5 . 6 . The Canonical Energy - Momentum Tensor The Transformation Law of the ...
Optical Angular Momentum
... momentum and energy and the seemingly natural separation of the angular momentum into spin and orbital components in the paraxial approximation , are investigated for a general nonparaxial form of monochromatic beam with near ...
First Stage Mechanics of Fluids
G. H. Bryan. 40. Units of momentum . - The unit of momentum is the momentum of unit mass moving with unit velocity . The F.P.S. unit of momentum is therefore the momentum possessed by the mass of 1 lb. moving with a velocity of 1 ft ...
Van Nostrand's Eclectic Engineering Magazine
... momentum will be one celeration , in other words , the velocity pound of mass moving with a velocity produced in one ... momentum which it is capable of the compound word as before , we have for the unit a pound - second . The ...
A Text-book of Physics
... momentum that of unit mass moving with unit velocity , the momentum of a mass m moving with a velocity v will be mv . The dimensions of momentum are [ L1M1T - 1 ] . The change in momentum of a body is proportional to the mass of the ...
The Mathematical Gazette
... momentum is mv , and it is in the position P say . The momentum is a vector in the forward direction along the tangent at P. But this vector is turning with angular speed v / r towards the radius PC . Thus momentum from P towards C ...
Physical Chemistry
... momentum . When a body is moving we say that it possesses momentum . The momentum , which is usually denoted by the symbol M , depends on the mass of the moving body ; the greater the mass , the greater the momentum . The momentum ...
Space--time--matter
... momentum distributed in the field with a density , and the addition of field - momentum from without . The current of the ith component of momentum is given by t ) , and thus the momentum - flux is nothing more than the Maxwell stress ...
The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science
... Momentum and Energy Relations . The principle of the conservation of momentum requires that the vector sum of the momentum of the system , which we shall suppose to consist only of the quantum , the photo- electron , and the photo ...
Mechanics and Heat
... momentum it acquires each second , and the force generating momentum will be numerically equal to the momentum generated per second divided by g . t This relation is very useful when considering impulsive forces , i.e. forces which act ...
London, Edinburgh and Dublin Philosophical Magazine and Journal of Science
... Momentum of the Normal Helium Atom . In discussions of atomic models it is commonly assumed , though without general proof , so far as the present writer is aware , that the average angular momentum of each electron and the resultant ...
Atoms and Rays
... Momentum Explanation of the Term Moment of Momentum 97 The momentum of a moving body is the product of its mass and its velocity . Thus the momentum of a 5 - ton truck , moving at 60 miles an hour ( or 88 feet per second ) is 440 foot ...
Popular Astronomy
... momentum thus imparted to them is supplied by , and taken from , the fund of the sun's angular momen- tum . The momentum thus supplied would be fully restored to that fund by the descending currents , provided there were no friction ...
Applied Mechanics
... momentum , the rate of change of mo- mentum of one body must be equal and opposite to the rate of change of momentum of the other . That is , the sum of the momenta is a constant ; and we have stated in different language the Principle ...
Philosophical Magazine
... Momentum and Energy Relations . The principle of the conservation of momentum requires that the vector sum of the momentum of the system , which we shall suppose to consist only of the quantum , the photo- electron , and the photo ...
Physical Review
... momentum of the photo - electron were transverse , as suggested by equation ( 1 ) . We must consider also , however , the conservation of angular momentum . If the photon acts instantaneously upon a photo - electron , as the experi ...
Analytical Mechanics for Students of Physics and Engineering
... momentum . 208. Moment of Momentum . - Angular momentum is often called moment of momentum , because the former may be considered as the moment of the linear momenta of the particles of the system under consideration . Let dm be an ...