http://hyperphysics.phy-astr.gsu.edu/hbase/mass.html#wgt
The Relativity of Mass:
Is there an objective (frame -independent) measure of an object's mass?
Mass is measured in units of weight,but the weight of an object depends upon the gravitational field it is under the influence of.
Thus not only is mass dependent upon velocity (the greater an object's velocity,the greater it's mass),but it is also dependent upon the gravitational field it is under the influence of...according to Newton's equation; Fg = G (m1*m2)/(d^2)
where G= gravitational constant (6.67*10^-11 Nm^2/kg^2)
In this equation the mass of m1 = Fgd^2/Gm2
Does this mean there is no objective measure of mass?
Afloat in zero G, one is weightless. But is one also massless?
m = 0 kg.
How do you measure mass (the matter/energy content of an object)in zero gravity?
An object with a mass of 50 kilograms weighs 491 newtons on the surface of the Earth; on the surface of the Moon, the same object still has a mass of 50 kilograms but weighs only 81.5 newtons.
(A newton is the force required to accelerate a mass of one kilogram at a rate of one meter per second per second)... but how much is a kilogram?
How is the above statement justified?
How is an invariant mass of 50 kg obtained?
The Relativity of Mass:
Is there an objective (frame -independent) measure of an object's mass?
Mass is measured in units of weight,but the weight of an object depends upon the gravitational field it is under the influence of.
Thus not only is mass dependent upon velocity (the greater an object's velocity,the greater it's mass),but it is also dependent upon the gravitational field it is under the influence of...according to Newton's equation; Fg = G (m1*m2)/(d^2)
where G= gravitational constant (6.67*10^-11 Nm^2/kg^2)
In this equation the mass of m1 = Fgd^2/Gm2
Does this mean there is no objective measure of mass?
Afloat in zero G, one is weightless. But is one also massless?
m = 0 kg.
How do you measure mass (the matter/energy content of an object)in zero gravity?
Intuitively one would think that the matter/energy content of an object should be the same wherever in the universe it is measured.
Perhaps "mass" is better defined in units of energy (Joules).
An object with a mass of 50 kilograms weighs 491 newtons on the surface of the Earth; on the surface of the Moon, the same object still has a mass of 50 kilograms but weighs only 81.5 newtons.
(A newton is the force required to accelerate a mass of one kilogram at a rate of one meter per second per second)... but how much is a kilogram?
How is the above statement justified?
How is an invariant mass of 50 kg obtained?
Also the mass of an object increases with (is dependent upon) the speed of the object
Also when energy is transformed into matter ,it acquires mass wch it did not have previously. How does mass emerge?
Where does mass arise from?
How is it created?
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Mass and energy are interconvertible and equivalent forms of one substance.
How is it created?
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Mass and energy are interconvertible and equivalent forms of one substance.
"Mass" is a potential/stored form of energy whose relationship with it's kinetic form is described by the equation e= mc2 or m=e/c2 or m=e(1/c2) where 1/c2 is a constant equal to 1.11265006 × 10-17 s2 / m2(please to convert to s^2/km^2) Because of the interconvertible nature of mass and energy ,all the stored energy in an object possessing mass can be theoretically converted to kinetic energy according to Einstein's formula, e= mc2 Although we cannot physically measure the mass of a photon (how do you weigh something moving 186,000 miles/second?) we can calculate it's "mass equivalent" by the formula m=e/c2 |
Can the Higg's Boson really explain why matter has mass?
http://www.cbc.ca/news/technology/story/2013/03/14/wrd-science-higgs-boson-particle-discovery.html
...as the speed "v" approaches "c"
ReplyDeleteIn Special Relativity (SR) an objects inertia increases as it approaches the speed of light, making it more and more difficult to increase the speed. You could assign this extra inertia to the mass of the object by saying the mass (this is actually called 'relativistic mass' , but I'll call it just mass) increases. Working this out it turns out the mass increases with a factor \gamma (v). This is a velocity dependent function increasing to infinity as the speed v approaches c thus making it impossible to acquire a speed large than c. In SR, time slows down and length is shortened by the same factor!
I dont fully understand the logic in squaring c ?
Its exactly the same as squaring velocity in the kinetic energy equation -- thats what you have to do to turn a velocity into an energy (well, that and multiply by mass and a proportionality constant).
energy - force * distance = mass * acceleration * distance
= kg * (m/s^2) * m
= kg * (m/s)^2
Thus we see that unitwise, energy is naturally the product of a mass multipled by the square of a velocity.
An electron also has charge, it has a spin quantum number of 1/2, and it has MASS. None of these properties are properties of light.
ReplyDeleteSo if you say that everything is made of light, you have to explain how these properties "emerge" out of energy.
How does the "Higgs Field" explain the "mystery of mass"?
ReplyDelete