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  2. Centripetal force - Wikipedia

    en.wikipedia.org/wiki/Centripetal_force

    The rope example is an example involving a 'pull' force. The centripetal force can also be supplied as a 'push' force, such as in the case where the normal reaction of a wall supplies the centripetal force for a wall of death or a Rotor rider. Newton's idea of a centripetal force corresponds to what is nowadays referred to as a central force.

  3. Parabolic aluminized reflector - Wikipedia

    en.wikipedia.org/wiki/Parabolic_aluminized_reflector

    For example, a PAR16 lamp is approximately 2 inches or 50.8 mm in diameter. [1] The size of rectangular PAR lamps is expressed as the letters REC followed by the reflector's mouth height, the letter "X", and the reflector's mouth width—with both dimensions in millimeters. For example, REC142X200 lamps are 142 high and 200 mm wide. [2] [3]

  4. History of centrifugal and centripetal forces - Wikipedia

    en.wikipedia.org/wiki/History_of_centrifugal_and...

    Since the centrifugal force of the parts of the earth, arising from the earth's diurnal motion, which is to the force of gravity as 1 to 289, raises the waters under the equator to a height exceeding that under the poles by 85472 Paris feet, as above, in Prop. XIX., the force of the sun, which we have now shewed to be to the force of gravity as ...

  5. Newton's theorem of revolving orbits - Wikipedia

    en.wikipedia.org/wiki/Newton's_theorem_of...

    A similar definition holds for θ 2, the angle of the second particle. If the path of the first particle is described in the form r = g(θ 1), the path of the second particle is given by the function r = g(θ 2 /k), since θ 2 = k θ 1. For example, let the path of the first particle be an ellipse

  6. Centrifugal force - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_force

    This reaction force is sometimes described as a centrifugal inertial reaction, [44] [45] that is, a force that is centrifugally directed, which is a reactive force equal and opposite to the centripetal force that is curving the path of the mass. The concept of the reactive centrifugal force is sometimes used in mechanics and engineering.

  7. Dying To Be Free - The Huffington Post

    projects.huffingtonpost.com/dying-to-be-free...

    Before he entered Recovery Works, the Georgetown treatment center, Patrick had been living in a condo his parents owned. But they decided that he should be home now. He would attend Narcotics Anonymous meetings, he would obtain a sponsor — a fellow recovering addict to turn to during low moments — and life would go on.

  8. Kepler problem - Wikipedia

    en.wikipedia.org/wiki/Kepler_problem

    The inverse square law behind the Kepler problem is the most important central force law. [1]: 92 The Kepler problem is important in celestial mechanics, since Newtonian gravity obeys an inverse square law. Examples include a satellite moving about a planet, a planet about its sun, or two binary stars about each other.

  9. Proximity to point sources of environmental mercury release ...

    images.huffingtonpost.com/2009-01-29-Palmer2008.pdf

    Health & Place ] (]]]]) ]]]–]]] Proximity to point sources of environmental mercury release as a predictor of autism prevalence Raymond F. Palmera,, Stephen Blanchardb, Robert Wooda