Most popular questions and responses by youssef
  1. physics

    . A long string carries a wave; a 6-m segment of the string contains four complete wavelengths and has a mass of 180 g. The string vibrates sinusoidal with a frequency of 50 Hz and a peak-to-valley displacement of 15 cm. (The “peak-to- valley” distance

    asked on March 24, 2015
  2. Physics

    As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and the cloud to be the other plate. The altitude of the cloud is 600m and its area is 6.5 km2. How much charge can the cloud hold before the dielectric

    asked on February 10, 2013
  3. Physics

    Rutherford, Geiger, and Marsden (his students) fired a beam of alpha particles at a gold foil. The alpha particles had an energy of about 3.6 million electron volts, a charge of +2e, and a mass of about four AMU (one Atomic Mass Unit is 1.66 x 10-27 kg.

    asked on February 10, 2013
  4. math

    i want a mathematic equation to apply on the number 579494 and get as a result the number 573 ,they told me that its simple but i can't figure it out(if somebody find many ways please give it all ).thanks

    asked on May 20, 2011
  5. Physics

    Three charges are located at the corners of a rectangle as follows: Charge A: lower left corner, -3.0 μC Charge B: upper left corner, -6.1 μC Charge C: upper right corner, +2.7 μC The distance between A and B is 0.16 m and between B and C it is

    asked on February 10, 2013
  6. Physics

    A positive and a negative charge are separated a distance r. What can we say about the electric potential energy of this two-particle system, according to our normal definitions of potential energy and work? Select the best answer. a. It is positive b. It

    asked on February 10, 2013
  7. math

    how to get 537 out of 579494 ?

    asked on May 19, 2011
  1. algebra

    120 boys left

    posted on July 17, 2018