hello how to do this please help me3. The relationship between four physical quantities is given by the equation P = Q - RS.
Given that the equation is homogeneous, which of the following statements must be correct?
A. P,Q, R and S all have the same units.
B. P,Q, R and S are all scalar quantities.
C. The product RS has the same units as P and Q,
D. The product RS is numerically equal to Q - P.
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