22. What is not an invariant under Lorentz transformation? (A) Speed of light (B) Charge (C) Energy (D) Rest mass (E) None of the above.

1. wo balls enter two frictionless tracks at the same time with the same velocity from the left end. Under the influence of gravity, which ball will arrive at the right end first (A) Ball A. (B) Ball B. (C) Two balls will have the same speed. (D) Uncertain; the answer depends on the height of the slides. (E) Uncertain; the answer depends on the curvature of the right slide.

22. What is not an invariant under Lorentz transformation?
(A) Speed of light
(B) Charge
(C) Energy
(D) Rest mass
(E) None of the above.

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