when a piece of gold was heated over a flame, which of the following will occur?
(1)Both the piece of gold and the falme will have the same internal energy eventually.
(2)The piece of gold will reach the temperature of the flame eventually.
(3)The potential energy of the piece of gold increases as the piece of gold expands
A.(1)only
B.(2)only
C.(1) and (3)only
D.(2) and (3)only
答案係d , 但係 (3) 點解正確, 唔係change state 先會increase potential energy?
唔係應該只得ke 上升??
thx
heat 問題 10分
2007-09-23 8:23 pm
回答 (2)
2007-09-23 8:33 pm
✔ 最佳答案
(3)The potential energy of the piece of gold increases as the piece of gold expands留意expand呢個字眼,expand即係意味住 particle 之間既distance 遠左,既然遠左 potential energy 當然increase
但係 (3) 點解正確, 唔係change state 先會increase potential energy?
唔係應該只得ke 上升?? 唔排除舊金慢慢溶緊,你唔係一剎那間由solid轉liquid state 你係慢慢轉,potential energy都係慢慢increase
參考: My Phy Knowledge
2007-09-23 8:32 pm
Because if the temperature rise, the matel(soild) will expand.
At the same time, potential energy wil also increse because the temperature rise.
At the same time, potential energy wil also increse because the temperature rise.
收錄日期: 2021-04-23 17:16:15
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