physics

posted by .

1.In a cathode ray tube, electrons are accelerated from rest by a
constant electric force of magnitude 6.56 x 10*-17 N during the
first 1.87 cm of tube's length; then they move at essentially
constant velocity another 45.0 cm before hitting the screen.
Find the speed of the electrons when they hit the screen.

How long does it take them to travel the length of the tube?

2.It takes 2.60 s for a small ball with a mass of 0.060 kg released
from rest from a tall building to reach the ground. Calculate
the height from which the ball is released.

If that ball had been released from the same height, but this
time above the surface of the moon, how long would it have
taken for the ball to hit the ground?

  • physics -

    1; you know acceleration (F/mass) and distance vf^2=2*acceleration*distance

    2; You know g, time, and mass.

    h=1/2 g t^2

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    The anode (positive terminal) of an X-ray tube is at a potential of +115 000 V with respect to the cathode (negative terminal). (a) How much work (in joules) is done by the electric force when an electron is accelerated from the cathode …
  2. chemistry

    how would the electrons produced in a cathode ray tube filled with neon gas compare with the electrons produced in a cathode ray tube filled with chlorine gas?
  3. Physics

    In a television tube, electrons initially at rest are accelerated by a uniform electric field of magnitude 4.0 105 N/C during the first 5.0 cm of the tube's length; then they move at essentially constant velocity another 45 cm before …
  4. Physics

    In a cathode ray tube, electrons initially at rest are accelerated by a uniform electric field of magnitude 4.71 x 105 N/C during the first 5.49 cm of the tube's length; then they move at essentially constant velocity another 47.9 …
  5. Physics

    In a cathode ray tube, electrons initially at rest are accelerated by a uniform electric field of magnitude 4.71 x 105 N/C during the first 5.49 cm of the tube's length; then they move at essentially constant velocity another 47.9 …
  6. Physics

    In a cathode ray tube, electrons initially at rest are accelerated by a uniform electric field of magnitude 4.71 x 105 N/C during the first 5.49 cm of the tube's length; then they move at essentially constant velocity another 47.9 …
  7. Physics

    The anode (positive terminal) of an X-ray tube is at a potential of +105000 V with respect to the cathode (negative terminal). (a) How much work (in joules) is done by the electric force when an electron is accelerated from the cathode …
  8. physics6

    In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.2 multiplied by 10-17 N during the first 2.2 cm of the tube's length; then they move at essentially constant velocity another 43 …
  9. physics14

    In a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.2 multiplied by 10-17 N during the first 2.2 cm of the tube's length; then they move at essentially constant velocity another 43 …
  10. Physics

    The anode (positive terminal) of an X-ray tube is at a potential of +125000 V with respect to the cathode (negative terminal). (a) How much work (in joules) is done by the electric force when an electron is accelerated from the cathode …

More Similar Questions