The positive muon (? +), an unstable particle, lives on average 2.20×10? 6s (measured in its own frame of reference) before decaying. a. if such a particle is moving, with respect to the laboratory, with a speed of 0.910 c , what average lifetime is measured in the laboratory? b. what average distance, measured in the laboratory, does the particle move before decaying?

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d