Synthesis Essay Example | Topics and Well Written Essays - 1250 words - 1

Synthesis - Essay Example It states that a capacitor is described as a device that is passive in nature and is used for the purpose of storing up energy for use in its own electric field. Any item which can be charged electrically and store energy, can be assumed to be a capacitor. The authors reiterate that the capacitor comprises of two plates, which are usually separate from each other by the use of a dielectric. The two plates are good conductors of electricity and that is why they are separated by an insulator. A capacitor is used in the situation where huge amounts of charge are to be distributed within a short time. The book notes that a capacitor’s charge level depends on the amount of voltage that is applied to the capacitor. If the capacitor is connected to a battery that has high voltage, then more amounts of charge will be supplied to the capacitor’s conductors, as compared to when the capacitor is connected to a battery of a low voltage level. Capacitance is usually a function that does not depend on the difference in potential value between the conductors of the capacitor as well as the charge that is present on the plates. Capacitance can be compared directly to the overlap area created by the two conductor plates of the capacitor. On the other hand, it is inversely comparative to the distance of separation between the plates. Connection of capacitors can be done either in series or parallel in a circuit. The authors say that in some cases, an integration of the two arrangements can be incorporated. The amount of time taken to charge a capacitor relies on the size of the capacitor as well as that of the resistor in the electric circuit. Capacitance is usually measured in units known as the Farad abbreviated as F. one Farad is equivalent to one Coulomb/Volt which is abbreviated as F=C/V. the book states that the stored up energy in the capacitor is usually measured in units known as joules, and it is equivalent to the work that has been

The history of south africa between 1650 and 1913 Essay

The history of south africa between 1650 and 1913 - Essay Example The Dutch colony in South Africa, established after their arrival in 1652, was â€Å"accidental† (Keegan 15). The Dutch had initially intended South Africa to be no more than a trading post. They hoped that they would be able to trade with the native population to ensure supplies for their ships. However, this arrangement did not work out as well as the Dutch had planned and a decision to colonise the area was made. In order to do this, the Dutch came into conflict with the Khoikhoi natives through colonising their land. This act of force was met with heavy native resistance (Ross 22-23). The first Khoikhoi-Dutch war began in 1659 and was ended with a treaty, acknowledging Dutch rights over the disputed territory. The Dutch had successfully exploited native tribal tensions despite low morale and limited numbers. The conflict did not end with the imposition of the treaty; in 1673 a four year war began as a result of the murder of white elephant hunters. At the end of the war, t he Dutch seized at least 1,765 Khoikhoi cattle and 4,930 sheep. Even though the Dutch never again declared war on the them, this was the beginning of the end for the Khoikhoi and they were forced to retreat to other areas (Frederickson 30-31). The second point to be analysed is the arrival of the British and how this impacted on the Dutch and the Bantu, with particular reference to the Xhosa. Like the Dutch, the British occupation in South Africa was not initially about colonisation. The first occupation, beginning in 1795, was a â€Å"temporary measure† aimed at preventing the French from gaining authority in the area and to â€Å"guarantee provisions and a safe harbor for Britains great Asian fleets† (Beck 42). Life in the colony continued as it had done prior to the British invasion, but there was significant concern about unrest in Eastern frontier