Andrew pokes a marble, and the marble rolls down a ramp. The marble moves with speed. Which forces are acting on the marble in this situation? When Andrew pokes the marble, he gives it force. As the marble rolls down the ramp, force pulls it down. The movement of the marble is slowed down by from the ramp.

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

the answer is a 3.8cm

explanation:

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

b. preoperational

just took it