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labview1958
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Is there any quantity in physics that has the unit kg^2 in it?
Take any physical quantity with units of kg and square it and give it a name. Then you have a physical quantity with units of kg^2.labview1958 said:Is there any quantity in physics that has the unit kg^2 in it?
labview1958 said:Is there any quantity in physics that has the unit kg^2 in it?
Andy Resnick said:That's an interesting observation: length and time both occur with many different exponents, but mass does not, apparently.
Could you elaborate on this?AlephZero said:And how the "MLT" units for electrical quantites, for example charge = M0.5L1.5T-1, relate to all this is another question!
AlephZero said:And how the "MLT" units for electrical quantites, for example charge = M0.5L1.5T-1, relate to all this is another question!
lugita15 said:Could you elaborate on this?
Yes, I already knew about CGS units. I thought you meant there was a way to relate them in SI.Redbelly98 said:There is an alternative system of units for electromagnetism, http://en.wikipedia.org/wiki/Gaussian_units" , where Coulomb's law is written without any proportionality constant:
[tex]F = \frac{Q_1 Q_2}{r^2} \text{ ,}[/tex]
i.e. without the factor of k or 1/4πεo. With units of force and distance already defined in mechanical physics, this equation determines the units of charge in much the same way that F=ma sets the units of force to be MLT -2.
Solving the above equation for the charges, we get
[tex]Q_1 Q_2 = F \ r^2[/tex]
So the units of charge2 are equivalent to F·r 2. Or we can say that the units of charge are equivalent to (F·r 2)1/2:
Charge units ~ (MLT -2 · L2)1/2 = (ML3T -2)1/2 = M1/2L3/2T -1
AlephZero said:I'm not sure that exponents of length and time are completlely analogous though.
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The unit kg^2 is used in physics to measure the quantity of moment of inertia, which is the measure of an object's resistance to changes in rotational motion. It is also used to measure the quantity of angular momentum, which is the measure of an object's rotational momentum.
Yes, other units such as meters squared (m^2) and centimeters squared (cm^2) can be converted into kg^2 using appropriate conversion factors. This is because kg^2 is a unit of area, and area can be expressed in various units.
No, kg^2 is not a base unit in the SI system of measurement. The base units in the SI system are meter, kilogram, second, ampere, kelvin, mole, and candela. However, it is a derived unit that is commonly used in physics.
Kg^2 is not directly related to the concept of mass in physics. However, it is used in equations that involve mass, such as the equation for moment of inertia (I = mr^2), where m is the mass in kilograms and r is the distance from the axis of rotation in meters.
Yes, kg^2 can be used to measure quantities in other fields such as engineering and mechanics. It is a unit of area, which is a fundamental concept in these fields. However, it may not be commonly used in other fields outside of physics.