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 × 10-31 kg, e = 1.60 × 10-19 C, k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A) 75.0 m/s
B) 106 m/s
C) 130 m/s
D) 1.06 × 103 m/s
E) 4.64 × 105 m/s
Answer: B
You might also like to view...
Two children, each of mass 20.0 kg, ride on the perimeter of a small merry-go-round that is rotating at the rate of 1.0 revolution every 4.0 s. The merry-go-round is a disk of mass 30. kg and radius 3.0 m
The children now both move halfway in toward the center to positions 1.5 m from the axis of rotation. Calculate the kinetic energy before and after, and the final rate of rotation. Explain any changes in energy.
In a parallel circuit, the size of the current flowing through each device may be different
a. True b. False Indicate whether the statement is true or false
The activation enthalpy for creep is determined in Example Problem 9.1 between the temperatures of 1083 K and 1053 K. Determine the activation enthalpy between 973 K and 1053 K using the stress of log ?=7.10.
What will be an ideal response?
The celestial equator always crosses the horizon at the east point and west point
Indicate whether the statement is true or false