. The separation d between A and B is the same as the separation between B and C. One of the charges is positive and two are negative, as the drawing shows. Consider the net electrostatic force that each charge experiences due to the other two charges. Rank the net forces in descending order (greatest first) according to magnitude. (a) A, B, C (b) B, C, A (c) A, C, B (d) C, A, B (e) B, A, C

the descending order of the forces is

          B A C

Therefore the correct result is e

Explanation:

To answer this exercise we must use that the forces are vector magnitudes and the value is given by Coulomb's law

                   F = k q₁q₂ / x²

Consider the following scheme                          

              A    B     C

             -q  + q   + q

                  x      x

The forces are

           F_AB = k q² / x²

           F_AC = k q² / 4x²

           Fo = k q² / x²

           F_AB = Fo

           F_AC = ¼ Fo

           F_BC= F_AB

The forces on the charge A are

          F_A = F_AB + F_AC

          F_A = Fo + ¼ Fo

          F_A= 5/4 Fo

The forces on the charge B

        F_B = -F_AB - F_BC

        F_B = - Fo - Fo

        F_B = -2 Fo

The forces on the load C

        F_C = F_BC –F_AB

        F_C = Fo - ¼ Fo

        F_C = ¾ Fo

For this distribution of charges the descending order of the forces is

          B A C

Therefore the correct result is e

If the charge distribution has the scheme          

              A      B     C

             + q   -q    +q

                    x     x

Force on A

           F_A = FA_B - F_BC

           F_A = Fo - ¼ Fo = ¾ Fo

Force on B

         F_B = F_AB –F_BC

        F_B = 0

Force on  C

          F_C = F_AC - F_BC

          F_C = ¼ Fo - Fo

          F_C = - ¾ Fo

For this distribution of charges the descending order of the forces is

          A B C

result is  a

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.