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17. The dimensions of mass and time in power are 1) 1,2 3) 2.-3 ant and C is the velocity of R' is the Rydis@rg co then RhC has the same dimensional formula as that of 1) Energy 18. I R' is the Rydborg constant, h is the Planck 's constant and 4) Power 2) Force 3) Angular momentum ions of strength of clectric current in resistivity 3)-3 4)-2

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