複選題

3. Which of the following is correct?
(A) Given physical quantities A and B of the same dimension (e.g. they are both the lengths of something), and quantities C and D of the same dimension, if D is uniquely determined by A, B, and C, there must be some num nerical constants k and n (of no dimension) such that D = kC(A/B)ⁿ.
(B) The moon is orbiting around the earth with roughly the samne period as that for its spinning around its own axis.
(C) The gravitational potential energy for N point masses is the distance between particle i and particle j, and G is the Newton constant.
(D) As the kinetic energy is given by a diffcrent formula, the total energy of an isolated system is not conserved in special relativity.
(E) The friction is a conservative force. GMMI