# Yahoo奇摩 網頁搜尋

1. ### hear 和internal energy有什麼分別?

internal energy 係 KE(kinetic energy) 加 PE (Potential eneergy) 而heat 係 KE 既一種 舉個例 如果你煲水，水溫上升，咁即係 KE 上升緊，不過因為無變形態，所以PE無變， overall 講就係 internal energy 升緊，同埋會 heat 緊D水 如果D 水變緊...

2. ### Why sound can be heard

你應該參考生物學書本，簡單講，耳仔內有耳膜，耳骨，同神經未稍，聲音震動耳膜，傳入耳骨，刺激神經未稍產生訊號傳入大腦。

3. ### heat resistance materials

Hear resistant materials can stand very high temperatures without ...

4. ### Sound ge問題

...vacuum, sound cannot be produced. Hence, we cannot hear the bell ring. 2. The speed in solid is faster. The...

5. ### F.4 Physics

Alice will hear a loud sound since the path difference is 0,so it is a constructive interference Peter will hear a soft sound since the path difference is 10.2-6.8=3.4,so it is a destructive interference

6. ### physics waves........

.... So, for the case of constructive interference, alternative loudness sound should be heard , as amplitude of the wave is still varying. But, for an ideal case...

7. ### al physic mc

43. Hear produced = (3.1x10^17).(50x10^3).(1.6x10^-19).(0.995) w = 2,468 w Answer...

8. ### AL physics (waves)

...500 x (330 + 30)/(330 - 25) = 590 Hz So beats per second heard by the driver in D = 590 - 507 = 83 Hz

9. ### 在太空星戰中是否不能聽到爆炸聲的?

the only reason to hear explosion sound in the movie is IT IS A MOVIE...wave, need media (like water, air, wall etc) to transfer so you CANNOT hear explosion in the space. actually you have already answer in yr question...

10. ### red shift (physics)

...observer and the source are moving towards each other. When you hear a pitch changing from high to low, the source and the observer are ...