physics

posted by .

Where must an object be placed to have a
magnification of 3.74 in front of a converging
lens of focal length 14.1 cm?

  • physics -

    Let do be the object distance and di be the image distance.
    di/do = 3.74, the magnification.

    1/do + 1/di = 1/do + 1/(3.74 do)
    = 4.74/(3.74 do)
    = 1.267/do = 1/14.1

    Solve for do.

  • Physics -

    Three identical small Styrofoam balls of mass
    1.53 g are suspended from a fixed point by
    three nonconducting threads, each with a
    length of 56.4 cm and negligible mass. At
    equilibrium the three balls form an equilateral triangle with sides of 31 cm.
    What is the common charge carried by
    each ball? The acceleration of gravity is
    9.8 m/s
    2
    and the value of Coulomb’s constant
    is 8.98755 × 10
    9
    N · m2
    /C
    2
    .
    Answer in units of µC

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    two lenses,one converging with focal length 20.0 cm and one diverging with focal length -10.0 cm , are placed 25.0 cm apart. An object is placed 60.0 cm in front of the converging lens. Determine A) The position and B) the magnification …
  2. Science Important

    1. A toy of height 18.4 cm is balanced in front of a converging lens. An inverted, real image of height 33 cm is noticed on the other side of the lens. What is the magnification of the lens?
  3. physics

    Hi! could any help me please, thank you. 1.An object is placed 17.8 cm from a first converging lens of focal length 13 cm. A second converging lens with focal length 24 cm is placed 10 cm to the right of the first converging lens. …
  4. physics

    Please, anyone help me please. Q: An object is placed 17.8 cm from a first converging lens of focal length 13 cm. A second converging lens with focal length 24 cm is placed 10 cm to the right of the first converging lens. (Take the …
  5. Physics

    Two converging lenses are placed 31.0 cm apart. The focal length of the lens on the right is 22.0 cm, and the focal length of the lens on the left is 15.0 cm. An object is placed to the left of the 15.0 cm focal-length lens. A final …
  6. physics

    The Yerkes refracting telescope has a 1 m diameter objective lens of focal length 20 m.Assume it is used with an eyepiece of focal length 4.31 cm. Find the angular magnification of the planet Mars as seen through this telescope
  7. Physics 2

    A converging lens with a focal length of 19 cm is used to form an image on a screen that is 3.3 m to the right the lens. Where must the object be placed?
  8. Physics

    Where must an object be placed to have a magnification of 3.74 in front of a converging lens of focal length 14.1 cm?
  9. Physics

    A lighted candle is placed 38 cm in front of a diverging lens. The light passes through the diverging lens and on to a converging lens of focal length 10 cm that is 5 cm from the diverging lens. The final image is real, inverted, and …
  10. physics

    Two converging lenses, having focal length 5 cm and 10 cm respectively, are placed 25cm apart. An object is placed 10 cm in front of the lens of focal length 5cm. Determine the position and magnification of the final image formed.

More Similar Questions