{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# mhw3 - Problems Due 9/30 7.10(Graded(1 1(easy Suppose one...

This preview shows pages 1–2. Sign up to view the full content.

Problems: Due 9/30 7 . 10 ( Graded ) (1) 1. (easy) Suppose one photon has an energy of 200 MeV and is traveling along the x axis. Suppose another has an energy of 100 MeV and is traveling along the y axis. (a) What is the total energy of this system? (b) If a single particle had this same energy and moemntum, what would be its mass? (c) In what direction would it be traveling? (d) With what speed? 2. (medium, Graded ) A particle as observed in a certain reference frame (i.e. observer A ) has a total energy of 5 GeV and a momentum of 3 GeV /c (i.e. cp which has the dimension of energy, is equal to 3 GeV ) (a) What is the energy in the frame in which its momentum is equal to 4 GeV / c, i.e. an observer B moving with velocity v relative to A measures a momentum of 4 GeV / c. (b) What is its rest mass in GeV/c 2 and what is the ratio between this mass and the proton mass? (c) What is the relative velocity of the two frames? 3. ( medium ) A neutral π meson ( π o ) decays into two γ rays (and nothing else). If a π o (whose rest mass is 135 MeV is moving with a kinetic energy of 1 GeV: (a) What are the energies of the γ rays if the decay process causes them to be emitted in opposite directions along the pion’s original direction.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}