The half-life of a muon is 2.2 s. How fast is it moving relative to an observer who says its half-life is 4.4 s?
a. 0.87 c
b. 0.75 c
c. 0.97 c
d. 0.72 c
e. 0.50 c
Question 2
Nix and Hydra are moons of ______________ .
a. Earth
b. Venus
c. Neptune
d. Mars
e. Pluto