A proton is fired at 2.10×107 m/s toward a mercury atom from far away. Mercury has a diameter of 14.0 fm and is element number 80. What is the closest distance the proton will get to the surface of the mercury atom?

A proton is moving through a magnetic field of magnitude 4.40 × 10–3 T. The proton experiences only a magnetic force of 3.3 × 10–15 N. At a certain instant, it has a speed of 4.25 × 105 m s–1. Determine the angle (less than 90°) between the proton's velocity and the magnetic field.

A parallel plate capacitor is formed from two circular plates, each of radius 1.20 cm, separated by 1.70 mm. The plates are charged to ±±8.70 nC.A proton is shot from the negative plate to the positive. What launch speed must the proton have to just barely reach the positive plate?

A proton enters the gap between a pair of metal plates (an electrostatic separator) that produces a uniform, vertical electric field between them. Ignore the effect of gravity on the proton. (a) Assuming that the length of the plates is 27.1 cm, and that the proton will approach the plates at a speed of 15.0 km/s, what electric field strength should the plates be designed to provide, if the proton must be deflected vertically by 1.20 ⋅ 10−3 rad?1.20 · 10−3 rad?   N/C (b) What speed does the proton have after exiting the electric field?  m/s (c) Suppose the proton is one in a beam of protons that has been contaminated with positively charged kaons, particles whose mass is 494 MeV/c2 (8.81 ⋅ 10–28 kg)494 MeV/c2 (8.81 · 10–28 kg) , compared to the mass of the proton, which is 938 MeV/c2 (1.67 ⋅ 10–27 kg)938 MeV/c2 (1.67 · 10–27 kg) . The kaons have +1e charge, just like the protons. If the electrostatic separator is designed to give the protons a deflection of 1.20 ⋅ 10−3 rad1.20 · 10−3 rad , what deflection will kaons with the same momentum as the protons experience? (You may enter your calculation using scientific notation.)  rad

The figure provided shows the potential energy of a proton, q = +e, and a lead nucleus, q = +82e. If a proton is fired toward a lead nucleus from a large distance away, how much initial kinetic energy does the proton need to reach a turning point 5.00 fm from the nucleus?

A proton travels at a speed of 7.20×107 m/s along the x-axis. What is the magnetic field at the point (0.00 cm, -7.00 cm, 0.00 cm) when the proton passes through the origin?