Write an activity to perform "observing air pressure" through the given
material glass tumbler, some cotton and water trough.
Answers
Answer:
Showing The Effects Of Air Pressure
Materials Needed: Clear soda straw; glass of water.
Procedure: Stick the straw down into the water. Observe the water level inside the straw. Next, remove the straw and place your thumb over the top of the straw. While holding your thumb over the top of the straw, stick the straw down into the glass and note where the water level is inside the straw. Leve the straw where it is and remove your thumb from the straw. Observe the water level again. Finally, place your thumb over the top of the straw while it is still in the water and lift it out. What do you see?
What To Look For: You should notice that the change in the water level is affected by whether the air can get in or out of the top of the straw.
What Happened: When you first placed the straw in the water, the air was pushed out of the top of the straw by the water below. However, when you placed your thumb over the top, the air was not able to leave and it exerted pressure on the water to keep the water from filling the straw. When you lifted your thumb, the air could escape from the top of the straw, and the straw filled with water. Finally, when you replaced your thumb and lifted the straw from the water, the water remained inside the straw, since air could not take the water’s place through the top of the straw.
Answer:
to jaan lo na ji. ..
Hume. .