a positive rod is placed to the left of sphere a, and the spheres are separated. which best describes the spheres? a) sphere a is negative and sphere b is positive because protons from sphere a are attracted to the rod and move to sphere b. b) sphere a is negative and sphere b is positive because electrons from sphere b are attracted to the rod and move to sphere a. c) sphere a is positive and sphere b is negative because electrons from the rod move to sphere b and protons then move to sphere a. d) sphere a is positive and sphere b is negative because protons move from sphere b to the rod and also to sphere a.

B - Sphere A is negative and sphere B is positive because electrons from sphere B are attracted to the rod and move to sphere A.

Explanation:

The rod is positively charged which means that it will repel positive charges (protons) and the rod will attract negative charges (electrons)

If you look at all the options that are given each one of them has a flaw, lets look at them one by one for better understanding of the concept:  

(A) Sphere A is negative and sphere B is positive because protons from sphere A are attracted to the rod and move to sphere B.  

      -Incorrect because protons which carry a positive charge CANNOT be    attracted by the rod because as by the diagram the rod is also positively charged  

(C) Sphere A is positive and sphere B is negative because electrons from the rod move to sphere B and protons then move to sphere A.’

Incorrect because sphere B has protons and not electrons as we can see it in the diagram given below.

(D) Sphere A is positive and sphere B is negative because protons move from sphere B to the rod and also to sphere A.

Incorrect because protons cannot move from sphere B to the rod since the rod is positively charged and like charges always repel.

most voltage drop calculators want the distance between the source and destination. then internally, they double it so both the source and return wires are calculated. but you need to know which distance the calculator uses so you're not half of what you should be or double what you should be.

most circuit breakers will not take a #6 directly, so the electrician will have to splice on a smaller pigtail. you also have to upsize the grounding wire when you upsized the ungrounded (hot) wire (see note in 250.122). this will preclude using most cable assemblies, as a cable with #6 copper will most likely only have a #10 grounding conductor. you need a #6 grounding conductor if the circuit is 20a. a #8 cable is no better, as it will have a #10 grounding conductor too. but most 20a breakers will take a #8 directly.

in your related post, you didn't say what type of load this is. if it is a light or heater, voltage drop won't be a big issue. if this is a motor, the current needs are huge at startup and the voltage drop can pose a problem. if this is a motor, knowing if the motor is under much load during startup will answer the voltage drop effect (a saw is easier to start than a compressor).

i dont think you are wrong for wanting to get even with someone who did you wrong.

(i'm an eye for an eye kind of person) but if this person hurt you in a sexual way, i dont suggest doing anything to him. he should be taken to the proper authorities, you could go to jail depending on what you do. if it was something small like your sibling took your spot on the couch, than yea, i would get even with him by taking one of his favorite snacks lol. but i dont suggest you doing anything illegal.