Radioactive muons formed high in the atmosphere have an average lifetime of 2 millionths of a second and travel toward Earth at nearly the speed of light
Because of their altitude most of them should have decayed by the time they reach the Earth's surface, according to pre-relativity physics. They don't because they
A) live longer due to time dilation.
B) travel a shorter distance due to length contraction.
C) both of these
D) neither of these
Answer: C
You might also like to view...
A wave on a lake is found to have a wavelength of 2 m and a frequency of 0.3 Hz. What is the speed of this wave?
What will be an ideal response?
Match the moons listed to the left with the characteristics described in the sentences to the right. Drag words from the left to the blanks on the right. Each moon should be used only once.
The neutral pion decays by 
The rest mass of the neutral pion is 135 MeV/c2. What is the energy of each of the photons if the pion is at rest when it decays?
A. 270 MeV B. 135 MeV C. 67.5 MeV D. 1.02 MeV E. This decay cannot happen.
What does the prefix centi- stand for?
What will be an ideal response?