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To: metmom; count-your-change; bvw; TCH; valkyry1; Fichori
Mass at rest is equal to mass.

No Mass at rest is equal to Force or are you disagreeing with M=F/A?

No wonder you were surprised by your conclusion. I’d be surprised if I came to a conclusion that stupid as well.

Well at least is wasn't as stupid as your conclusion that Mass=Mass though while true is meaningless.

Do I need to point out that atomic reactions are the direct, real world, conversions of mass to energy? Mass really is the equivalent of energy (force). And with that comes the conclusion that if you accelerate mass (add energy) you increase the mass?

Are these 'simple' concepts really that hard to understand?

The last remark was not aimed at bvw, TCH or Valkyryl

431 posted on 01/12/2009 8:43:41 PM PST by LeGrande (I once heard a smart man say that you canÂ’t reason someone out of something that they didnÂ’t reaso)
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To: LeGrande

I’d can understand people’s confusions with your mighty words. Maybe you should provide diagrams.


459 posted on 01/13/2009 4:49:37 AM PST by bvw
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To: LeGrande; metmom; All

F=Ma

Force is the resultant of two components: mass and acceleration.

Anything composed of atoms has mass. Mass is the amount of “stuff” of which an object is composed; but mass is not “weight.” Weight is actualy a measure of the force generated by an object within a gravitational field. Weight is the result of the acceleration of gravity. So we may write F=Ma as W=Mg.

Acceleration is a “change” in velocity OR direction. Where velocity is a measure of an object’s speed in relation to time and space, when changing its position at a constant rate in a straight line. However there is ALWAYS a component of acceleration, no matter how imperceptible, because EVERYTHING in the universe is moving in relation to everything else, and moving along CURVED paths... not straight lines. All mass is effected by gravity fields, and mass produces gravity (curved space time) Velocity is used for calculations having a simple frame of reference, but does not provide the whole picture.

If there is no acceleration component, then there is no energy of motion (kinetic) and thus no force produced; however the acceleration of gravity is always present for any object within Earth’s gravitational field (32fps^2), and likewise the influence of the Moon and other celestial bodies, so there is always the energy of mass in motion, whether it be perceived as a kinetic “force” (momentum) or a gravitaional “force” (weight). Weight is actually the “force” an object exerts on another object due to the influence (acceleration) of a gravitational field. Even when an object is moving at a fixed rate of speed (velocity) there still is a component of acceleration because the object is moving over a curved surface (the earth of other celestial body) or through curved space (gravity) and thus a change in the directional vector is always present.

For any moving object, its acceleration may have a linear or a rotational component. An object in orbit about the Earth, or any other celestial body, “falls” at a fixed rate of speed (velocity) about a center of another mass (the celestial body) and thus while the magnitude of the velocity vector is constant the directional vector is always changing, hence there is a moment of acceleration. This is why orbital mechanics require the use of “the calculus” (derivatives and integration) because there is a continuous dynamic change over time in the x, y or z plane.

Because acceleration is a “change” in speed OR direction, objects appearing to be at rest are actually in acceleration: The Earth is rotating (24 hour period) and precessing (23000 yr period) on its axis, and, in turn, the Earth orbits the Sun (365 day period), which, in turn, orbits within the galactic plane, which, in turn, is in recession from other galaxies... etc. We are always moving... even when dead, for our dust is made of atoms that remain in motion.

In reality, because everything in the universe is in motion in relation to everything else, and all mass is affected by and effects a gravitational field, then force can never equal zero. If F=Ma, and F=0 then transposing the equation to solve for mass: m=F/a; we have m=0/x, which equals zero; but everything has mass. Conversely, we could solve for acceleration: a=F/m, where F=0, in which case acceleration would equal zero; but everything is in motion at some level. There is the mathematical absurdity where if mass or acceleration equaled zero then we would have a=F/m or m=F/a ==> 0=x/0, which is an untrue statement, for we know that division by zero is impossible (except in the case where the numerator is zero... so 0=0/0 gives zero mass, zero force, and zero acceleration: non-existence. (Off topic, the question of whether any object having mass is capable to travel at the speed of light is made impossible by the Lorentz transforms, where as an object approaches the velocity of light, its mass approaches infinity, thus the acceleration, and hence energy required by its propulsion unit, also becomes infinite.)

Nothing is ever at rest. If we go to the molecular scale, we know that molecules move and vibrate (temperature). In the electromagnetic spectrum, photons of light propagate at different frequencies to produce the colors of the visible spectrum. If their frequency is very short (ultra-violet radiation, x-radiation, gamma radiation, cosmic radiation) or very long (infrared, microwaves, television-VHF and UHF, radio) then they are at energy levels outside what the rods and cones of human retina is “tuned” to receive. At the sub-atomic level the electrons rotate about their nucleus so fast (speed of light) that we see them where they were, not where they are. The atoms of gas (solar wind) ejected by our star, the Sun, generate a force when they encounter the Earth’s magnetic field (bow shock wave) and release their kinetic energy in the form of the Aurora Borealis.

So everything is in motion... converting its energy to kinetic or chemical energy, and, in turn, dissipating that energy in the form of heat (entropy, 2nd Law of Thermodynamics, SLT) By the SLT all things fade to black: all energy converts to heat; higher states of energy degenerate to lower states; purposeful organization devolves to random chaos. This law cannot be violated in the natural sphere... organization can only be begun and sustained by something operating outside all laws, both physical and philosophical... something not bound by any law... something greater than law... the author of law, its First Cause... He whom we know as God.


479 posted on 01/13/2009 8:37:19 AM PST by TCH (Another redneck clinging to guns and religion)
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