Question

Оформите как экспериментальное задание Возьмите маленький кусочек ватки. Наэлектризуйте пластмассовую расчёску и поднесите её к ватке. Ватка наэлектризуется и притянется к расчёске. Резко дёрнув расчёску, оторвите ватку и быстро подведите расчёску под ватку. Почему ватка плавает в воздухе?​

Answer 1

Ответ:

Вака И расческа бУДУТ иметь ОДИНАКОВЫЙ

заряда как ИЗВЕСТНО одноименные заряды

отталкиваются, ОТСЮДА И эффект плавания

В ВОЗДУХЕ.

Answer 2

Experimental Task: Why does the cotton ball float in the air?

To conduct this experiment, you will need a small piece of cotton ball and a plastic comb. Follow these steps:

1. Take a small piece of cotton ball. 2. Rub the plastic comb against your hair or a woolen cloth to electrify it. 3. Bring the electrified comb close to the cotton ball. You will notice that the cotton ball becomes electrified and is attracted to the comb. 4. Quickly pull the comb away from the cotton ball, causing the cotton ball to detach from the comb. 5. Immediately bring the comb close to the cotton ball again.

Now, let's discuss why the cotton ball floats in the air during this experiment.

Explanation:

When you rub the plastic comb against your hair or a woolen cloth, it becomes charged with static electricity. This process is known as triboelectric charging. The rubbing causes the transfer of electrons between the comb and the material it is rubbed against, resulting in the comb becoming negatively charged and the material becoming positively charged.

When you bring the electrified comb close to the cotton ball, the negatively charged comb attracts the positively charged cotton ball. This attraction is due to the principle of electrostatic force, which states that opposite charges attract each other.

When you pull the comb away from the cotton ball, the cotton ball remains charged with the same polarity as the comb. However, since the comb is no longer in close proximity, the electrostatic force between them decreases. As a result, the cotton ball is no longer strongly attracted to the comb and can be detached.

When you quickly bring the comb close to the cotton ball again, the electrostatic force between them is reestablished. However, this time, the cotton ball is not attached to the comb and is free to move. The electrostatic force causes the cotton ball to be repelled by the comb, resulting in it floating in the air.

It's important to note that the floating effect is temporary and will eventually dissipate as the charges on the cotton ball and the comb gradually neutralize.

Conclusion:

In conclusion, the cotton ball floats in the air during this experiment because of the electrostatic force between the charged comb and the charged cotton ball. The initial attraction between the comb and the cotton ball causes the cotton ball to be lifted off the surface. When the comb is pulled away and quickly brought close again, the repulsive electrostatic force causes the cotton ball to float in the air.

Please let me know if you have any further questions!