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.
Crunchy and delicious, pine nuts are small seeds of the pine cone. Botanically, the tree belongs to the Pinaceae family. Pine nut is known by several names like cedar nuts, pinon nuts, pinyon nuts and pignoli.It is called chilgoza in Hindi. Chilgoza is found commonly in India, Pakistan and Afghanistan. The seeds are small and elongated, measuring one to two inches in length.he seeds have a sweet and buttery flavor. It is used extensively in the preparation of pesto and pasta, casseroles and meat curries. The nuts are also added to vegetable and fruit salads.