F1 science

為甚麼雙層金屬片受熱後會彎曲？
This is because of the difference in expansion of the two metals making up the bi-metallic strip. The one with larger expansion coefficient will then be longer than the one with lower expansion coefficient.

為甚麼氫氣球會上升？
It is because the density of hydrogen is lower than that of air. Thus, the upthrust acting on the hydrogen balloon is larger than its weight (result of Archimedes Principle).

2受熱時，氣體的膨脹幅度較液體為大。 True

3雙層金屬片受熱時會彎曲，但長度沒有改變。False

4固體、液體和氣體遇冷收縮，收縮幅度以氣體為最大。True

5氣球被吹漲是因為氣球外的氣壓減少所致。 False

5)氣球被吹漲是因為氣球外的氣壓減少所致。

Is True,,

The Pressure Of Ballon Increase So The Atmosphere's Pressure Decreases,,

其中一塊金屬膨脹幅度較大,唯有向上彎曲

2是
3非

2: YES

3: YES

4: NO 好似液體

5: NO 氣球內的氣壓減少所致