Problem: Capacitor:

For maximum life, capacitors usually need to be able to handle the maximum amount of reversal that a system will experience. An AC circuit will experience 100% voltage reversal, while under-damped DC circuits will experience less than 100%. Reversal creates excess electric fields in the dielectric, causes excess heating of both the dielectric and the conductors, and can dramatically shorten the life expectancy of the capacitor. Reversal ratings will often affect the design considerations for the capacitor, from the choice of dielectric materials and voltage ratings to the types of internal connections used.

What does voltage reversal create in the dielectric of a capacitor?
---
A: excess electric fields

Problem: Southern Europe:

European overseas expansion led to the rise of colonial empires, producing the Columbian Exchange. The combination of resource inflows from the New World and the Industrial Revolution of Great Britain, allowed a new economy based on manufacturing instead of subsistence agriculture.

What replaced agriculture as the focus of European economy with the establishment of overseas colonies?
---
A: manufacturing

Problem: Planck constant:

There are both practical and theoretical difficulties in determining h. The practical difficulties can be illustrated by the fact that the two most accurate methods, the watt balance and the X-ray crystal density method, do not appear to agree with one another. The most likely reason is that the measurement uncertainty for one (or both) of the methods has been estimated too low it is (or they are) not as precise as is currently believed but for the time being there is no indication which method is at fault.

Why does this difficulty occur?
---
A: it is (or they are) not as precise as is currently believed

Problem: Roman Republic:

After recovering surprisingly fast from the sack of Rome, the Romans immediately resumed their expansion within Italy. The First Samnite War from 343 BC to 341 BC was relatively short: the Romans beat the Samnites in two battles, but were forced to withdraw before they could pursue the conflict further due to the revolt of several of their Latin allies in the Latin War. Rome beat the Latins in the Battle of Vesuvius and again in the Battle of Trifanum, after which the Latin cities were obliged to submit to Roman rule.

Who did Rome claim victory against in The Battle of Vesuvius?
---
A:
Latins