An alpha particle is accelerated with 5MeV of kinetic energy towards the nucleus of a gold atom with atomic number 79. What is the distance of closest approach that is reached by the alpha particle?
45 femtometers to two significant figures
JM
Related Physics A Level answers
All answers ▸Two pendulums consist of a massless rigid rod of equal length attached to a small sphere of equal radius, with one sphere hollow for one pendulum and the other solid. Each pendulum undergoes damped SHM. Which pendulum has the largest time period?
A ball is dropped from rest from a window 3m above ground height. How long will it take the ball to hit the ground? (You may assume air resistance on the ball is negligible.)
A car of mass 800 kg is accelerated horizontally by constant net force of 1920 N for 9 s. It then breaks for 2 s, but drives off a 5 m high cliff. If μ = 0.85, what is the total horizontal distance travelled by car and its velocity? Ignore air resistance.
Describe how the strong nuclear force between nucleons varies with seperation of the nucleons.