mechanics- physics

An electron moving at a speed of 5 x 10 raise to power 6m/s was shot through a sheet of paper which is 2.1 x 10 raise to power 4cm thick. The electron emerges from the paper with a speed of 2 x 10 raise to power 6 m/s. Find the time taken by the electron to pass through the sheet.


Pls show full working and formular.

asked by precious
  1. v₀ =5•10⁶ m/s
    v=2.1•10⁶ m/s
    s=2•10⁻⁴ = 2•10⁻⁶ m
    ------------
    v= v₀-at
    a= (v₀-v)/t
    substitute 'a' in
    s=v₀t+at²/2
    and solve for 't'

    posted by Elena
  2. substitute 'a' in
    s=v₀t - at²/2
    and solve for 't'

    posted by Elena
  3. Please save yourself the extra time of writing scientific notation numbers such as
    5*10^6
    Instead of
    5 x 10 raise to power 6.
    It is also easier to read.

    In the case of this problem, divide the thickness of the paper by the AVERAGE speed of the electron as it passes through. That average speed is
    3.5*10^6 m/s.

    I think you have omitted an important minus sign. I have never seen a sheet of paper 210 meters thick.

    posted by drwls
  4. thanks

    posted by varsha

Respond to this Question

First Name

Your Answer

Similar Questions

  1. mechanics- physics

    An electron moving at a speed of 5 x 10 raise to power 6m/s was shot through a sheet of paper which is 2.1 x 10 raise to power 4cm thick. The electron emerges from the paper with a speed of 2 x 10 raise to power 6 m/s. Find the
  2. mechanics- physics

    An electron moving at a speed of 5 x 10 raise to power 6m/s was shot through a sheet of paper which is 2.1 x 10 raise to power 4cm thick. The electron emerges from the paper with a speed of 2 x 10 raise to power 6 m/s. Find the
  3. mechanics- physics

    An electron moving at a speed of 5 x 10 raise to power 6m/s was shot through a sheet of paper which is 2.1 x 10 raise to power 4cm thick. The electron emerges from the paper with a speed of 2 x 10 raise to power 6 m/s. Find the
  4. Machanics

    An electron moving at a speed of 5 multiply by 10 raise to power six m/s was shot through a sheet of paper which is 2.1 multiply by 4cm thick.the electron emerges from the paper with a speed of 2 multiply by 10 raise to power six
  5. college physics

    i need solutions for all this problems...help please.... 1.) an electron moving at a speed of 4x10 power of 6 m/s, shot through a sheet of paper which is 3x10 to power of -5 m thick. the electron energyfrom the sheet with with a
  6. mechanics of materials

    A metal bar with a cross-sectional area of 50mm2 is subjected to a tensile strain of 0.001. What is the tensile force responsible for the strain given that the material has a Young's modulus of 15GNm raise to the power -2 A 0.003N
  7. Physics

    Consider an electron entering a region between two charged metal plates where, aside from the electric field E, there is also a constant magnetic field B directed into the paper. V is the velocity of the electron (from left to
  8. Physics (Mechanics)

    An electron of mass 9.1E-31 kg is released from rest at a distance of 7.1 E-10 m from a fixed electron. The force on the movable electron is given by the function F = 2.3E-28/r^2, where r is the distance between the electrons.
  9. schoolcraft college

    a student decides to construct a capacitor using two conducting plates 30cm on each side. He seprates the plate with a paper dielectric 2.5 that is 8*10 raise to the power -5 mmerters thick. What is the capacitance of the
  10. MATHS

    SIMPLIFY SIN RAISE TO POWER 4 MINUS COS RAISE TO POWER4 DIVIDED BY 1 MINUS 2SIN RAISE TO POWER 2

More Similar Questions