Question

Виконати експериментальне завдання. «Гріємо лід». Візьміть два шматочки льоду, кожний покладіть в окремий поліетиленовий пакет. Один із пакетів ретельно обмотайте ватою або махровим рушником. Покладіть пакети на тарілки та поставте їх у шафу. За годину розгорніть пакети. Поясніть результат.

Answer 1

Experimental Task: "Heating Ice"

To conduct the experimental task "Heating Ice," you will need two pieces of ice, two separate polyethylene bags, cotton wool or a terry towel, and two plates. The steps for the experiment are as follows:

1. Take the two pieces of ice and place each one in a separate polyethylene bag. 2. Carefully wrap one of the bags with cotton wool or a terry towel, ensuring that it is well-insulated. 3. Place both bags on separate plates. 4. Put the plates with the bags in a cupboard or any enclosed space where the temperature is relatively stable. 5. Leave the bags undisturbed for one hour. 6. After one hour, carefully unfold the bags and observe the results.

Explanation of the Results

The purpose of this experiment is to observe the effect of insulation on the rate of ice melting. By wrapping one of the bags with cotton wool or a terry towel, we are providing insulation to the ice inside that bag. The other bag is left without insulation.

The expected result is that the ice in the insulated bag will melt at a slower rate compared to the ice in the non-insulated bag. This is because insulation helps to reduce heat transfer between the ice and its surroundings, slowing down the melting process.

When you unfold the bags after one hour, you should observe that the ice in the insulated bag has melted less compared to the ice in the non-insulated bag. The ice in the non-insulated bag may have melted significantly or even completely, while the ice in the insulated bag may still be partially or mostly intact.