If an electron is accelerated from rest through a potential difference of 1 200 V, find its approximate velocity at the end of this process. (e = 1.6 × 10^?19 C; me = 9.1 × 10^?31 kg)
a. 2.5E+7 m/s
b. 2.1E+8 m/s
c. 2.1E+7 m/s
d. 4.2E+7 m/s
e. 1.8E+8 m/s
c
You might also like to view...
Why is Venus's atmosphere hotter than Mercury even though it is farther from the Sun?
a. Venus has a thin atmosphere thus allowing more of Sun's radiation to enter. b. Venus contains water vapor in its atmosphere, which absorbs more heat. c. Venus contains 96 percent CO2 resulting in very hot temperatures d. Mars contains more CO2, which has a cooling effect on its atmosphere. e. Mercury has a hotter atmosphere because it is closer to the Sun than Venus.
A point charge of +2.5 ?C is located at the origin of a coordinate system and a second point charge of ?5.6 ?C is at x = 1.9 m. At what point on the x axis is the electrical potential zero?
a. +4.3 m b. +5.3 m c. +0.59 m d. +11 m e. +1.3 m
A 2.0-kg body moving along the x axis has a velocity vx = 5.0 m/s at x = 0 . The only force acting on the object is given by Fx = (?4.0x) N, where x is in m. For what value of x will this object first come (momentarily) to rest?
a. 4.2 m b. 3.5 m c. 5.3 m d. 6.4 m e. 5.0 m
A stone is thrown at an angle of 30° above the horizontal from the top edge of a cliff with an initial speed of 14 m/s. A stop watch measures the stone's trajectory time from top of cliff to bottom to be 7.1 s. How far out from the cliff's edge does the stone travel horizontally? Note: g = 9.8 m/s2 and air resistance is negligible
a. 58 m c. 86 m b. 68 m d. 197 m