Forces that are equal in size but opposite in direction are called what ?

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot

Idon’t quite understand this problem

A6.0-μf air-filled capacitor is connected across a 100-v voltage source. after the source fully charges the capacitor, the capacitor is immersed in transformer oil (of dielectric constant 4.5). how much additional charge flows from the voltage source, which remained connected during the process?