qr

2 qr.

003 qr.

00I qr.

001 qr.

00+ (c,~, oa,,,)q,, = Qr, (28)

00Called Nosebleed QR (Quick Relief), the product is composed of a hydrophilic polymer, a synthetic powder that absorbs blood, and potassium salt that aids in scab formation.

00qr,, be the generalized coordinates of any dynamical system, and let pi, P2,

01If the system is supposed to obey the conservation of energy and to move solely under its own internal forces, the changes in the co-ordinates and momenta can be found from the Hamiltonian equations aE aE qr = 49 - 1 57., gr where q r denotes dg r ldt, &c., and E is the total energy expressed as a function of pi, qi,.

01In the time dt which the wave takes to travel over MN the particle displacement at N changes by QR, and QR= - udt, so that QR/MN = - u/U.

01Then the reflected ray QR and the ray reflected at R, and so on, will all touch the circle drawn with ON as radius.

01Comparing this equation with ux 2 +vy 2 +w2 2 +22G'y2+2v'zx+2W'xy=0, we obtain as the condition for the general equation of the second degree to represent a circle :- (v+w-2u')Ia 2 = (w +u -2v')/b2 = (u+v-2w')lc2 In tangential q, r) co-ordinates the inscribed circle has for its equation(s - a)qr+ (s - b)rp+ (s - c) pq = o, s being equal to 1(a +b +c); an alternative form is qr cot zA+rp cot ZB +pq cot2C =o; Tangential the centre is ap+bq+cr = o, or sinA +q sin B+rsinC =o.

01+(s - b)pq= oor - qr cot 2A+rptan ZB +pgtan 2C=o,with centre - ap+bq+cr = o.

01If we now apply them to the case of a rigid body moving about a fixed point 0, and make Ox, Oy, Oz coincide with the principal axes of inertia at 0, we have X, u, v=Ap, Bq, Cr, whence A (B C) qr = L,

01Since an, = a,r, the coefficient of Q, in the expression for qr is identical with that of Q,- in the expression for q,.

01If we omit the gyrostatic terms, and write qr = Cre, we finc~, for a free vibration, (aj,1~2 + birX + Cm) C~ + (asrX2 + birX + Cm) C2 +

01These variables represent the whole assemblage of generalized co-ordinates qr; they are continuous functions of the independent variables x, y, 1 whose range of variation corresponds to that of the index r, and of 1.

01equality of the angles of incidence and reflection, that the reflected ray QR is such that the angles RQC and CQP are equal; to determine the caustic, it is necessary to determine the envelope of this line.

01

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