Photons have zero rest mass, but at the speed at which they move ... always the speed of light ... they have momentum, energy, and mass. Photon energy = (h n) Kinetic energy = (1/2 m c2) = (h n) ===> mass = (2 h n / c2) Momentum =(m c) = (2 h n / c) (h = Planck's constant, n = frequency, c = speed of light)

C(n)H(2n+2)

0, Cbonds to 3 H and to C. Second C triple bonds to N .

H

H C-C---N:

H

W-I-T-C-H- - 2004 N Is for Narcissist 2-14 was released on:

USA: 16 September 2006

H H O

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H - N - C - C - OH

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H - C - H

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H