Get an index card, playing card or something similar; a coin and a cup. Place the index card over the cup and the coin on the center of the card.
Get the coin in the cup, without touching the coin or lifting up the card..

1.Explain why the coin falls into the cup. Include scientific language that you have learned.

2.Pull the card slowly. What happens to the coin? Explain why.
Include scientific language that you have learned.

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

The pressure proportional to the area a- inversely b- directly c- increase d-decrease