Heat transfer always occurs from a region of high temperature to another region of lower temperature. Heat transfer changes the internal energy of both systems involved according to the First Law of Thermodynamics.
Cyperus esculentus (also called chufa sedge, nut grass, yellow nutsedge, tiger nut sedge, or earth almond) is a crop of the sedge family widespread across much of the world.It is native to most of the Western Hemisphere as well as southern Europe, Africa, Madagascar, the Middle East and the Indian Subcontinent.n Spain, C. esculentus is cultivated for its edible tubers, called earth almonds or tiger nuts, for the preparation of  horchata de chufa, a sweet, milk-like beverage. However, in most other countries, C. esculentus is considered a weed.
what is dragon fruit. Dragon fruit (UK: pitaya) is the fruit of several types of cacti of the genus Hylocereus and Selenicereus. The fruit is native to Mexico, Central America and South America, but is now also cultivated in Asian countries such as Taiwan, Vietnam, the Philippines, Indonesia and Malaysia.hat is dragon fruit. Dragon fruit (UK: pitaya) is the fruit of several types of cacti of the genus Hylocereus and Selenicereus. The fruit is native to Mexico, Central America and South America, but is now also cultivated in Asian countries such as Taiwan, Vietnam, the Philippines, Indonesia and Malaysia.