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

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d