3 ฤดูกาล
46 ตอน
Why Is It So? - Season 3 Episode 10
Everything is magnetic to more or less degree, says Miller. He suggests making an iron bar a magnet just by aligning it properly and striking it at one end. Then he introduces the electromagnet. And just how strong is a magnetic force? It's a puzzler.
- ปี: 2012
- ประเทศ: Australia
- ประเภท:
- สตูดิโอ: PBS
- คำสำคัญ:
- ผู้อำนวยการ:
- นักแสดง: Julius Sumner Miller
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