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The pressure is increased because more gas particles are added into the ball which crowds them, thus increasing the pressure.

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Flossie Kozey

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2y ago
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11y ago

As you pump more air into the ball, there are more and more molecules of gas in the ball. The increase in pressure causes the ball to expand slightly, but lets say the volume of the ball is constant for our purposes. The more gas molecules there are in the same amount of space (volume) the closer the molecules get to one another. The closer the molecules are the more strongly they repel one another. The more strongly the molecules repel, or push against one another, the stronger they push out on the inside surface of the ball. That push is what we call pressure. The mathematical representation of this is PV=NRT where P=Pressure, V=Volume, N=Number of particles or molecules, R=a constant you don't need to worry about if you are asking this question, and T=temperature. At a constant T, if N goes up, the product of PV must go up, so if you are in a fixed size container like a Basketball, V cannot change, so P must increase.

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Q: Why does pumping more air into a basketball increase pressure inside the ball?
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Why does pumping more air into a basketball increase the pre inside the ball?

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Why does pumping a soccer ball with an air pump increase the pressure inside the ball?

Pumping air into the soccer ball increases the number of air molecules inside the ball, which creates more collisions with the ball's walls. This increase in collisions results in higher pressure inside the ball.


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How could you increase the preassure inside the ball without adding more air?

You could increase the pressure inside the ball by heating it up. When you heat the air inside the ball, the molecules move faster and spread out, causing an increase in pressure.


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To study how air pressure in a basketball changes with temperature, you will need a pressure gauge to measure the air pressure inside the basketball accurately. Additionally, you will require a thermometer to monitor the temperature of the basketball during the experiment.


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