بحث في مادة الإنجليزية لطلاب الثانية ثانوي لمن يهمه الامر

Means:
In this experiment we need to:
1 - glass bottle with a long neck
2 - Basin
3 - the amount of hot water over 80 degrees Celsius
4 - cover suitable for closing the bottle
Steps:
Close the bottle and put it inside the tub and add water until it becomes hot water bottle half or more
Note:
Moments later, we note the start cap and flight away from the bottle
Explanation: When we closed flask Hpsona amount of air inside and know that the gas expands with heat and i
ncrease in size as the bottle of glass, do not increase in size and this increases the pressure inside and accelerating air molecules inside, which generates considerable pressure pushes the air towards the cover out of it Then shall the cover strongly away from the bot

Means:
We need to:
1 - a piece of cork
2 - candle length of 5 or 6 cm
3 - glass basin where water
4 - long glass
Keep the candle over a piece of cork and let it float above the surface of the water inside the aquarium glass and ignite the candle after it stabilizes put over the candle glass tube
Note: We note that after a period of water seemed to rise into the tube and then stops with the extinguished candle
Explanation:
To burn the candle should be burning the air and this reduces the air inside the tube, which decreases the pressure inside the glass tube to fill the place of the air that was burned and stops with the cessation of combustion

Means:
* Lamp
* Electrical wires
* The Shiites
* Magnet
Altrickbp pass on the following:
Deliver the coil wire connection and then the correct lamp Btaiqp
And then enter Aghannatis inside coil and move back and forth
• Note: After a short note glow lamp
• Explanation: When connecting the magnet coil generates an electric current is called the inciting Aldahirp magnetic