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  1. 理論上conduction, radiation 都有, 首先conduction指傳導,傳導是以粒子振動的方式把能量轉開去.傳導必須要有...熱能,而且粒子和粒子之間因為不斷互相撞擊,能量便能由發熱器傳到麵包上. 而 radiation ,指幅射,在熱學上指熱幅射,是一種電磁波的,電磁波無須介質就可以傳播,就連...

  2. 我諗藍芽唔係 radiation 藍芽是一種無線傳輸的技術,可以讓桌上及膝型電腦、個人數位助理(PDA...

  3. infra-red radiation 係輻射其中一種,叫紅外輻射.. 1)The thermos or vacuum flask 由於淺色吸收...

  4. Alpha radiation has a low penetrating power, it is not strong enough to pass... to monitor the volume of milk in the box. Therefore, Beta radiation is suitable as the radioactive soce.

  5. ...photon given out. This, of course, leads to a stronger radiation beam. The relation between the intensity of radiaiton and the activity is not...

  6. ... will have a higher chance of interacting with the radiation passing through it) or atoms that compose the material. Lead ...

  7. 假設杯水唔會從surroundings得到能量through radiation i.e the temperature of water is higher than...i.e.杯水可能會從surroundings得到能量through radiation let me consider this assumption 'There...

  8. ... the speed of electromagentic wave be 3 x 10^8 m/s Hence, frequency of radiation = 3x10^8/(3/100) Hz = 10^10 Hz = 10 billion Hz 2014-07-24 17...

  9. ...the contrary, if the inner surface is also painted black, heat transfer by radiation would become more effective. The temperature of air inside the box should appear to be...

  10. radiation 係指以electromagetic(EM) wave電磁波傳播能量 所謂EM wave係由electric field...