The muon is a particle that has the same charge as an electron, but at rest is 207 times as massive. unlike electrons, muons are unstable and decay in 2.2 hs, producing an electron (and a neutrino which has almost zero mass.) muons are created high above the earth when cosmic rays (high energy protons or nuclei arriving from space) collide with atomic nuclei of nitrogen and oxygen found in the atmosphere. the muons approach the earth with an astounding velocity of 0.995 c. the earth's magnetic field deflects some of the cosmic rays, and it also redirects the muons. a laboratory high on mt washington, 1900 m above ground in new hampshire, where the local magnetic field is 15 x 10-6t directed north, made important measurements of this muon "rain" in 1963 that confirmed the theory of special relativity _7. in the muon's frame of reference (a) their lifetime is shorter than 2.2 us (b) their lifetime is longer than 2.2 us (c) the distance to the earth is longer than expected (d) the distance to the earth is shorter than expected (e) more than one of the above _8. in the earths' frame of reference (a) their lifetime is shorter than 2.2 us b) their lifetime is longer than 2.2 hs (c) the distance to the earth is longer than expected (d) the distance to the earth is shorter than expected (e) more than one of the above 9. a laboratory at the foot of mt washington and the lab at the top of mt washington agree that they observed 2 muons decay at exactly the same time. to the muons (a) this is also correct (b) the muon at the top decayed before the mon at the ground (c the muon at the ground decayed before the muon at the top. 10. the cosmic rays would be (a) deflected in the same direction as the muons (b) deflected in the opposite direction as the muons (c) deflected at 90° to the muons (d) not deflected at all 11. if it were not for the earth's magnetic field, the muons would have landed (a) to the west of new hampshire (b) to the east of new hampshire (c) exactly where they did land (d) north of new hampshire (e) south of new hampshire _12. the high velocity of the muon changes what an outside observer measures for (a) its mass, only (b) its charge, only (c) both its mass and its charge (d) neither its mass nor its charge