Question

1. Why does the liquid move into the siphon when air is removed from the siphon by the
pipette?

2. How does the liquid flow uphill out of the upper cup?

3. Why doesn't the liquid in the siphon flow back down into the upper cup as well as down
into the lower cup?​

Answer 1

Answer:

1. A basic siphon consists of a tube in a larger container that goes up over a hump (the edge of the container) to empty out into a container at a lower level. ... This decrease results in the atmospheric pressure on the surface of the liquid pushing liquid up into the tube toward the area of lower pressure.

2. Gravity accelerates the water through the "down" part of the tube, into the lower cup. Because water has strong cohesive bonds, these water molecules can pull the water behind them through the uphill portion of the tube, according to Wonderopolis, a site where daily questions get answered.

Sorry , I don't know the third question ...