reply to post by AnonyJai
Oh how I wish that physics and all of these theories weren't so far above my head.
Well, the thing about it is, that the actual physics is sort of simple... it's just the mathematics that DESCRIBE ACCURATELY the fundamental workings
of physics are somewhat complex.
Let's take a basic starter course:
Newton's law of motion... F=MA
This states that the Force of an object is equal to it's mass multiplied by it's acceleration.
Acceleration as a variable, describes two properties, one is direction of movement, the other is change of speed over a unit time... given as Meters
per second per second (m/s^2)
Mass is always given in the S.I. formation of Kilograms (approx 2.2 lbs)
And force is given in Newtons (One newton being the amount of energy required to accelerate a one kilogram weight to a velocity of one meter per
second over the course of one second.
So, to break down the Formula (F=MA) we can calculate that a one kilogram mass, travelling at one meter per second, is exerting no force.
However, if we change the velocity of that mass (acceleration) by having the mass impact upon a stationary object.... the Mass of the object (1)
multiplied by the Acceleration of the object (1m/s^2) gives us a net force of 1 newton (1*1=1)
This can also be done in reverse, where a stationary body (80kg) accelerated to 100 meters per second, over the course of one second, will require a
force of 8,000 newtons.
And since a newton is roughly equivalent to a watt second, we can extrapolate that the electrical force required to accelerate an 80 kilogram object
to 100 meters per second in one second would be roughly 8 kilowatts. (This is after entropic losses, of course)
This is roughly the encapsulation of newtons First and Second laws of motion.
Now, there are different measurements for energy of different types and flavours, for example:
A Watt is basically a continuous power source that expends one joule per second.... because a joule is instantaneous power, while a watt is a time
average measurement of power.
For example, a One watt system generates one joule per second for as long as it remains working.
While a one joule system will expend a maximum of one joule.
While a Joule is a measurement of instantaneous energy, and a watt is a measurement of time averaged electrical power, a newton is a measurement of
the force of momentum.
Furthermore, we have the calorie, which is a measurement of thermal energy equivalent to 4.18400 joules, or the amount of heat energy required to
cause an increase of temperature of one gram of water, by one degree Celsius, at atmospheric pressure.
Related to the Calorie, is the British thermal unit, which is 1,055.05585 joules, and also the joule is used as a measure of heat energy.
(The Calorie is used more often in bio-chemistry, and the BTU is used in Heating Ventilation and Air Conditioning applications)
In addition to these, we have a veritable plethora of other measures of energy:
We have Radient Flux, which is the measure of total energy emitted from a light source
We have Lumen, which measures the total amount of VISIBLE LIGHT emitted from a source
We have Lux, which is the SI unit for measuring luminous flux per unit area (Visible Photons striking an area)
Volt is the Electrical "Pressure" between two dissimilar charges
Ampere is the total flow of electrons across a conductor (1 ampere is the flow of one Coulomb(6.241 × 10^18 electrons) across a difference of one
volt, producing one watt across one ohm.)
Ohm is the measurement of resistance to current flow (Often called "load")
But when we get down to quantum mechanics.... we usually use the Electron Volt:
The ElectvonVolt (1.6×10^−19 joule) gives us the energy gained (or lost) by the charge of a single electron moved across an electric potential
difference of one volt.
In many physics applications, the ElectronVolt is used as a measurement of Momentum energy of a particle, or, the Force of the Acceleration of the
Mass of the particle.
So, when you see that a particle emission has an energy of 5MeV (5 million electron volts) that particle has the Momentum energy, equivalent to 5
million electrons accelerated across a one volt field.
But, yeah.... pretty complex jargon... but necessary due to the complexity of the different TYPES of forces we may need to describe with our
edit on 25-1-2013 by ErtaiNaGia because: (no reason given)