An electron of energy 20 gev is deflected through an angle of 5° in an elastic collision stationary proton. what is the value of the square of the 4-momentum transfer, q2, and down to what approximate distance does such a collision probe the internal structure of the proton? (the mass of the electron can energies involved. the proton mass mc2 is 0.938 gev.

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.