If a 15-ohm resistor is connected in parallel with a 30 ohm-resistor, the equivalent resistance is?

Explanation:

in parallel combination equivalent resistence =

1/R=1/R1 + 1/R2

1/2=1/15+1/30

1/2=1*2+1*1/30

1/R=3/30

R*3=30*1

R=30/3

R=10 ohm

12000j is work done

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it