A cosmic ray proton moving toward Earth at 5.00 × 10 7 m/s experiences a magnetic force of 1.70 × 10 −16 N . What is the strength of the magnetic field if there is a 45∘ angle between it and the proton's velocity? Positive charge of a proton is 1.6 × 10 −19 C 3.55 × 10^−5 T 3.01 × 10^−5 T 4.55 × 10^−5 T 5.20 × 10^−5 T