Question

In a cathode ray tube in an old TV, electrons are accelerated from rest with a constant acceleration of magnitude 7.55 x 1013 m/s2 during the first 2.08 cm of the tube's length; then they move at essentially constant velocity another 44.2 cm before hitting the screen. (a) Find the speed of the electrons when they hit the screen. (Show work) (b) How long does it take them to travel the length of the tube? (Show work)

Name: in a cathode ray tube in an old tv electrons are accelerated from rest with a constant acceleration of magnitude 755 x 1013 ms2 during the first 208 cm of the tubes length then they move at 34868
Uploaded: 2022-10-04T22:11:28-08:00
Duration: 3 min 16 s
Channel: Timothy James
Description: in a cathode ray tube in an old tv electrons are accelerated from rest with a constant acceleration of magnitude 755 x 1013 ms2 during the first 208 cm of the tubes length then they move at 34868

          In a cathode ray tube in an old TV, electrons are accelerated
from rest with a constant acceleration of magnitude 7.55 x 1013
m/s2 during the first 2.08 cm of the tube's length; then they move
at essentially constant velocity another 44.2 cm before hitting the
screen. 
(a) Find the speed of the electrons when they hit the screen.
(Show work)
(b) How long does it take them to travel the length of the tube?
(Show work)

Added by Clifford G.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Timothy James

10/04/2022

Step 1

Given: Acceleration, a = 7.55 x 10^13 m/s^2 Length of first part of the tube, l1 = 2.08 cm = 0.0208 m Using the formula v = a * t, where t is the time spent accelerating: t = sqrt(2 * l1 / a) t = sqrt(2 * 0.0208 / 7.55 x 10^13) t = sqrt(0.0416 / 7.55 x 10^13) t = Show more…

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In a cathode ray tube in an old TV, electrons are accelerated from rest with a constant acceleration of magnitude 7.55 x 1013 m/s2 during the first 2.08 cm of the tube's length; then they move at essentially constant velocity another 44.2 cm before hitting the screen. (a) Find the speed of the electrons when they hit the screen. (Show work) (b) How long does it take them to travel the length of the tube? (Show work)