Cho mạch điện như hình vẽ. r1=r3=3 ôm, r2=2 ôm, r4=1 ôm ,r5=4 ôm. cường độ dòng điện chạy qua mạch chính là 3A. tìm a) Uab
b)hiệu điện thế 2 đầu mỗi điện trở

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.

That would be the corect answer hope this

Iwannasay c is the most accurate

The correct answer is  "c".  it is "c" because melting is an endothermic change, and endothermic get's energy from surroundings.