IPA FISIKA : Percobaan Mengangkat Gelas dengan Balon, Pemuaian Gas (Praktek, Eksperimen Sederhana)

Summary

This educational video demonstrates a simple scientific experiment using a glass, a balloon, and a matchstick. As the matchstick is lit and placed inside the glass, the flame gradually extinguishes when the glass is sealed with the balloon, due to the lack of oxygen. This causes the air inside the glass to cool and the pressure to drop, creating a vacuum effect that causes the balloon to be sucked into the glass. The experiment explains how air pressure and oxygen levels influence physical reactions, offering a visual and easy-to-understand demonstration of these scientific concepts.

Takeaways

• 😀 The experiment begins with a glass and a balloon, along with a matchstick for lighting the fire.
• 😀 The matchstick is lit and inserted into the glass, where the fire starts burning.
• 😀 The glass is then covered with a balloon, trapping the flame inside.
• 😀 As the fire burns, it gradually goes out due to a lack of oxygen caused by the sealed balloon.
• 😀 The fire is extinguished because there is no more oxygen in the glass for combustion.
• 😀 Once the fire is out, the air inside the glass cools down, causing a decrease in air pressure.
• 😀 The reduced pressure inside the glass becomes lower than the surrounding outside pressure.
• 😀 This difference in pressure causes the balloon to be pushed into the glass by the higher external pressure.
• 😀 The balloon’s elasticity allows it to tightly seal the glass and easily lift it.
• 😀 The video concludes with a thank you message, encouraging viewers to like, comment, and subscribe.

Q & A

Why does the fire inside the glass eventually go out?

The fire goes out because the oxygen inside the glass is used up. The balloon blocks any further supply of oxygen, which is necessary for combustion to continue.

What role does the balloon play in this experiment?

The balloon acts as a seal over the glass, preventing oxygen from entering. This leads to the fire extinguishing due to the lack of oxygen, and the air pressure inside the glass decreases.

What causes the balloon to be sucked into the glass after the fire goes out?

When the fire burns out and the air inside the glass cools, the pressure inside the glass becomes lower than the outside air pressure. This causes the higher external air pressure to push the balloon into the glass.

How does the temperature inside the glass affect the pressure?

As the temperature inside the glass drops due to the cooling of the air after the fire goes out, the air pressure inside the glass decreases. This creates a pressure difference between the inside and outside of the glass.

What would happen if the balloon was not placed over the glass?

If the balloon was not placed over the glass, the fire would still go out due to lack of oxygen, but the air pressure inside the glass would not decrease as dramatically, and the balloon would not be sucked in.

Why is oxygen necessary for the fire to burn?

Oxygen is required for combustion. Fire needs oxygen to maintain the chemical reaction of burning, and once the oxygen in the glass is consumed, the fire will go out.

Why does the balloon tightly seal the glass after being sucked in?

The balloon's elasticity allows it to fit snugly over the opening of the glass. As the air pressure outside the glass is higher, the balloon is pushed tightly against the rim of the glass, creating a seal.

What is the connection between air pressure and temperature in this experiment?

The connection is that when the temperature inside the glass decreases (due to the fire going out), the air pressure also decreases. This causes the higher pressure outside to push the balloon inward.

Could this experiment be performed without a balloon?

It is possible, but without the balloon, the visual effect of the air pressure difference would not be as clear. The balloon helps demonstrate the movement caused by changes in air pressure.

What scientific principle is demonstrated in this experiment?

This experiment demonstrates the principles of air pressure, combustion, and the behavior of gases when temperature and pressure change. It visually shows how air pressure can be manipulated by changes in oxygen and temperature.