Cho mạch điện như hình vẽ. Biết Umn=18V cường độ dòng điện qua R2 là I2=2A. Tìm a) R1 nếu R2=6 ôm, R3= 3 ôm

b) R3 nếu R1= 3 ôm R2=1 ôm

c) R2 nếu R1=5 ôm, R3= 3 ôm

What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.

True or false graphs must include scales that increase by the same amount

How to tell if a molecule is polar or nonpolar with electronegativity