Três resistores ôhmicos, r1 = 2ohm, r2 = 4ohm e r3= 4ohm estão associados em paralelo. quando
ligados a um gerador ideal, a corrente elétrica total no
circuito é igual a 12 a.
a corrente elétrica e a diferença de potencial elétrico
no resistor r1
são iguais a?

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

Which is not true of the intertropical convergence zone? a) it features heavy precipitation b) it's where the trade winds collidec) it's a high-pressure zone with sinking air d) it is also known as the doldrums