Recent content by Cllzzrd

  1. C

    Touque and Work from a Dipole Moment

    Problem: A dipole consists of charges +q and -q separated by 0.62nm . It is in an electric field 2.6×104 C/N. What is the work required to rotate the dipole from being oriented parallel to the field to being antiparallel to the field? Equations: . 90...
  2. C

    Percent change in mass when gaining charge.

    I thought it was 9.11*10^-31Kg... If that is not it, what is? Is that where my calculations are going wrong?
  3. C

    Percent change in mass when gaining charge.

    Ok... checking units now... I will just do unit calculations without the numbers... then substitute the numbers back in later if I am correct. C*(e/C)*(kg/e)= kilograms gained... right? When I calculate this using the numbers, I still get the same, incorrect answer.
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    Percent change in mass when gaining charge.

    Homework Statement When an object such as a plastic comb is charged by rubbing it with a cloth, the net charge is typically a few microcoulombs. If that charge is 3.6*10^-6 C, by what percentage does the mass of a 39g comb change during charging? Homework Equations n/a? The...
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    Physics of a runner (Constant Acceleration/ constant velocity)

    Homework Statement "The 100- dash can be run by the best sprinters in 10.0 . A 64- sprinter accelerates uniformly for the first 41 to reach top speed, which he maintains for the remaining 59 ." What is the average horizontal component of force exerted on his feet by the ground during...
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    What is the acceleration of the elevator?

    Ok, I did not realize that it was a ratio. so now I solve for a m(g-a)/mg=.76 m(g-a)=.76mg g-a=.76g a=g-.76g a=9.8-.76(9.8) a=2.5 Thank you very much, this was the correct answer.
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    What is the acceleration of the elevator?

    Homework Statement A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.76 of the person's regular weight. Calculate the magnitude of acceleration of the elevator. Homework Equations F=ma N=ma-mg The...
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