features1.
fuel cell is a kind of generator that provides electricity, batteries are like warehouses that store electricity.
features2.
The maximum output energy from the battery
= 50% forms of energy+50% heat
=>The energy efficiency is 50%.
features3.
large energy density.
(store a lot of energy per weight)
Recently, as the amount of storage for capacito
A capacitor (originally known as condenser) is a passive two-terminal electrical component used to store energy in an electric field.
Suppose watermelon as a spherical capacitor
then capacity(C) is..
1. Find Gauss Surface(q) between two radius.
Then, electric field(E) is..
2. We can find Voltage(V) between initial point and final point.
So, We can find Capacity(C).
1. Introduction
The Korean futures market, including day time and night time, has become the largest futures market all around the world in terms of trading volume. Although Korean futures market has a variety of futures, the main underlying asset for futures that led the market to the summit is KOSPI 200 index, which is composed of diversified two hundred companies’ stocks traded in KOSPI ma
Ⅰ. introduction
A demand of Korean Cabbage has various characteristics compared with other food because of seasonally demand. First of all, there is strong seasonally demand change especially just before the winter. Traditionally, Koreans store cabbages with salt and levigated chili, we call it Kimch, in the fall for consuming during winter. Also, as same with other food, the supply of cabbag
1. Introduction
1) Definition of preservation and food-spoilage micro-organisms
Food preservation is the process of treating and handling food to stop or greatly slow down spoilage (loss of quality, edibility or nutritive value) caused or accelerated by micro-organisms. Some methods, however, use benign bacteria, yeasts or fungi to add specific qualities and to preserve food (e.g., cheese, wine
Ⅱ. 에탄올 발효
1. 에탄올 발효
생물화학적인 변환의 대표적인 예가 당질로부터 에탄올을 발효시키는 방법으로 오래전부터 인류와 함께해온 기술이다. 에탄올은 화학적 합성도 가능하지만 대부분 생물공정으로 생산되고 있다.
술을 제조하는 공정에서와 마찬가지로 당을 생성하는 작물로부터
Ⅳ. 전력공학의 공식
1. 물의 위치수두
1) 정의
수두를 헤드라고도 한다. 단위는 길이의 차원이나 위치 에너지를 구하는 기본이 되는 값이며, h는 수면의 높이이다. 즉, 단위 무게 [kg]당의 물이 갖는 에너지를 말한다.
2) 공식
위치 수두 = H [m]
2. 물의 압력수두
1) 정의
수관 속의 유수의 압력은 유