Need Help With a Lab?

Question

i did this lab and i would like to compare answers....

Drinking glass with a smooth rim

* Small square of cardboard about three inches square

Procedure: Work over a sink!

1. Fill the drinking glass with water up to the brim.

2. Place the cardboard on top of the glass and hold it down. Some extra water may escape.

3. Hold the cardboard against the glass with your fingers and turn the glass over.

4. Carefully remove your fingers.

5. You should be surprised and amazed by this strange occurrence.

6. Repeat the experiment with a new piece of cardboard and only one inch of water in the glass.

Observation / Analysis

Answer the following questions in complete sentences:

1. What observations did you make in each experiment?

2. Explain what holds the cardboard in place.

3. Explain what holds the water in place.

please help..... I really need a good grade in this chemsitry class

Answer 1

just do the assignment and spare us your drivel!  your need for a good grade doesn't mean a crisis for us.