An electron is released from rest at a distance of 9.00 cm from a proton. If the proton is held in place, how fast will the electron be moving when it is 3.00 cm from the proton? (mel-9.11 x 10-31 kg, e=1.60 × 10-19 C, k=1/40-8.99 × 109 N-m²/C2) X 01.06 x 103 m/s 130 m/s O 4.64 x 105 m/s Ⓒ75.0 m/s 106 m/s None of the given choices.

A small charged particle of mass 1.0 x 10-8 kg is traveling rightward between two plates separated by a distance d = 80 cm, as shown below. The electric field between the plates has a constant magnitude of 3.0 x 106 V/m and is directed leftward. The particle's speed is 5.0 x 103 m/s at the left plate and 2.0 x 10³ m/s at the right plate. Ignore the effect of gravity. F (a) Is the particle positively charged or negatively charged? Justify your answer briefly but clearly. (b) Find the charge (with correct sign) of the particle, as well as the potential difference (with correct sign) through which the particle has moved. (Note: The potential difference is positive if the right plate is at a higher potential than the left plate, and negative if the right plate is at a lower potential than the left plate. Show all your work; do not simply plug numbers into a result derived in class.)

A cathode-ray tube accelerates electrons to a speed of 26500 kms−1V. What is the potential difference across the tube?

Chapter 37, Problem 043 How much work must be done to increase the speed of an electron from (a) 0.14c to 0.15c and (b) from 0.92c to 0.93c? Note that the speed increase is 0.01c in both cases. (a) Number 0.7653 Units keV (b) Number Units keV

A constant electric field accelerates a proton from rest through a distance of 1.20 m to a speed of 1.53 ✕ 105 m/s. The mass and charge of a proton are  mp = 1.67 ✕ 10−27 kg and qp = e = 1.60 ✕ 10−19 C.)   (a) Find the change in the proton's kinetic energy (in J).  J  (b)Find the change in the system's electric potential energy (in J).  J (c) Calculate the magnitude of the electric field (in N/C).  N/C

A cyclotron is a machine that can be used to accelerate charged particles to achieve large kinetic energies.  The resulting beams of highly energetic particles then can be used for many medical applications, including Proton Therapy (a more precise form of "radiation" used in the treatment of some cancers).     A description of the cyclotron can be found in section 19.3 of the text.  If a proton (of mass 1.673x10-27kg) is accelerated to its maximum velocity inside a dee with radius 2.08cm (this is the radius you would use for the "r" term in the centripetal acceleration), and if the magnetic field has a magnitude of 2.44x10-2T, what is the resulting velocity of the proton in units of km/s (kilometer per second)?

A +5.6 C charged particle (m=2.0 kg) is placed 42 cm from a -3.7C stationary charge. If the particle starts from rest, how fast will it moving after it has traveled 24.0 cm. What is the change in potential energy, and what is the speed of the particle?