The Earth is showered with particles from space known as muons. They have a charge identical to that of an electron but are many times heavier (m = 1.88 · 10?28 kg). Suppose a strong magnetic field is established in a lab (B = 0.62 T) and a muon enters this field with a velocity of 2.2 106 m/s at a right angle to the field. What will be the radius of the resulting orbit of the muon? 1