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Recent content by luckywang

  1. L

    Biology; Chemistry; Physics: Post your doubts here!

    help me pls... :cry: describe the use of magnetic materials in audio/video tapes. discuss the dating of objects by the use of 14C. describe how the Geiger-Marsden alpha-particle scattering experiment provides evidence for the nuclear atom.
  2. L

    Biology; Chemistry; Physics: Post your doubts here!

    D...the ray is perpendicular why still bend?
  3. L

    Biology; Chemistry; Physics: Post your doubts here!

    is B? x is 30N, mass is 3kg..
  4. L

    Biology; Chemistry; Physics: Post your doubts here!

    help me on these? describe the use of magnetic materials in audio/video tapes. discuss the dating of objects by the use of 14C. describe how the Geiger-Marsden alpha-particle scattering experiment provides evidence for th nuclear atom.
  5. L

    Biology; Chemistry; Physics: Post your doubts here!

    transistor only included the npn transistor?
  6. L

    Biology; Chemistry; Physics: Post your doubts here!

    just point toward the page or opposite of the page.... o_O
  7. L

    Biology; Chemistry; Physics: Post your doubts here!

    use fleming left hand rule!
  8. L

    Biology; Chemistry; Physics: Post your doubts here!

    but how about q7 part(a)? is the whole left iron bar become north pole or one end is north while the other end is south?
  9. L

    Biology; Chemistry; Physics: Post your doubts here!

    thanks! it is very helpful!(y)
  10. L

    Biology; Chemistry; Physics: Post your doubts here!

    describe and explain circuits operating as light-sensitive switches and temperature operated alarms(using a reed relay) copy from syllabus...
  11. L

    Biology; Chemistry; Physics: Post your doubts here!

    someone help me on this?
  12. L

    Biology; Chemistry; Physics: Post your doubts here!

    sorry... next time i dont reply... just watch and learn..
  13. L

    Biology; Chemistry; Physics: Post your doubts here!

    26=A 30=B 32=B 39=B? correct?
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