16. The rest energy of a proton is 938 MeV, and the total energy of a proton is twice its rest energy. Find the momentum of the proton in MeV/c units, c is the speed of light.

6. A uniform spherical planet has mass M and radius R. A very thin tunnel passes from one end of the planet, through the planet center, and then out from the other end of the planet. A particle of mass m fell into one end of the tunnel and then performed simple harmonic motion. Find the angular frequency of the simple harmonic motion.

16. The rest energy of a proton is 938 MeV, and the total energy of a proton is twice its rest energy. Find the momentum of the proton in MeV/c units, c is the speed of light.

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