2. Particle physicists often don’t use joules as a unit of energy as for a subatomic particle, 1 joule is a tremendous a
Posted: Sat Jul 09, 2022 12:06 pm
2. Particle physicists often don’t use joules as a unit ofenergy as for a subatomic particle, 1 joule is a tremendous amountof energy. Instead, they use electron volts; 1 electron volt is theenergy an electron gains by accelerating over an electric potentialdifference of 1 volt. (Recall the charge of an electron is −1.6 ×10−19C, and its mass is 9.1 × 10−31kg) (a) Convert an electron voltinto joules. (Don’t look up the conversion factor; there’s enoughinformation in the problem to determine it.) (b) An electron is ina constant electric field which points to the right, and theparticle is released from rest. After it travels 1cm, it has gained12 electron volts worth of energy. How fast is the electrontraveling? (c) What is the electric field? (d) If the electron hadinstead had an initial velocity of ⃗v = 8.1 × 106m/s to the right,how far would it travel before it stopped?