Parallel conducting wires carrying currents in the same direction repel each other.
a. true
b. false

False

Explanation:

The direction of magnetic field on a current carrying conductor can be determined by the Fleming's right hand rule where

When two conductors carrying currents flowing in opposite direction, the magnetic field will be in the same direction hence they will repel.

When the currents in them flow in same direction, then it means the magnetic field will be opposition and there will be a force of attraction between the conductors.

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.