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Or is it just a waste of money?

Can someone please explain this concept? Like I understand that the "proper definition" refers to the export price index relative to the import price index. But how does this exactly work? You can have an exporting good, say a loaf of bread to one million dollars, but that doesn't necessarily...

I understand how the inequality of the distribution of income can be measured through the lorenz curve or the gini coefficient, but there is there any known measurement (within the HSC syllabus) for inequality in the distribution of wealth?

I understand how cooper pairs are formed, but how exactly do the "binding" of electrons, or cooper pairs allow for a smooth path across the crystal lattice? Like wouldnt these cooper pairs (or having two negatively charged electrons side by side which causes a greater 'negative' force) attract...

I've must of searched every single physics textbook there is - whether the Jacaranda, Macmillian, Physics in Context, Excel, Macquarie.. and they all say the same thing about momentum. "Momentum is the product of the mass and velocity of an object. It is given by the formula p = mv" blah blah...

I kinda understand the concept of g-forces... but its just the formula which is putting me off... I understand, that g-forces = apparent weight / true weight apparent weight = mg + ma true weight = mg therefore g-forces = (g + a) / g where g = acceleration due to gravity and a...

Is a vacuum classified as a medium?.. cauz im like totally lost about this Aether stuff.. if it isnt a medium, then it all makes sense..

I understand that the current account + capital and financial account = 0 .. but the one thing I'm not understanding is why? Can someone please explain why the current account balances the capital and financial account? Thank you in advance =)